[28] Who is the Antichrist and who are the Antichrists?

The short answer is Satan is the Antichrist and rotten saints who joined a true church and then left it are the Antichrists. These are the saints that Satan chose.

18 Young children [those who have been born again, not young children physically, but young children angelically], it is the last hour [the hour of the test in the day of the church or the day of the presence], and, just as you have heard that an antichrist is coming [Satan is coming down to the earth], even now there have come to be many antichrists; from which fact we gain the knowledge that it is the last hour.
19 They went out from us, but they were not of our sort; for if they had been of our sort, they would have remained with us. But [they went out] that it might be shown up that not all are of our sort [Antichrists are therefore not rotten saints who leave the true church but are weeds who were never wheat. They are sons not of Jacob but of Satan. They are not only from the church however for sons of Jacob must be sons of Isaac, but the sons of the DAC are not sons of Jacob].
20 And you have an anointing from the holy one; all of you have knowledge.
21 I write you, not because you do not know the truth, but because you know it, and because no lie originates with the truth [No son of the DAC was born again in a true church. But some of them come into the true church to corrupt it]
22 Who is the liar if it is not the one that denies that Jesus is the Christ? This is the antichrist, the one that denies the Father and the Son [Satan is this one, he denies Jesus and Jehovah and is plainly THE antichrist. But just as Jesus has a wife in the form of a congregation of angelic humans by the JAC, so Satan has a wife in the form of a congregation of angelic humans by the DAC. This is rather like the Man and mankind. We have the Antichrist and many antichrists. The wife of Satan denies Jesus and his covenant tree son Jacob. If you deny the ARC and the JAC then you are not going to be sealed and are not a holy saint. You are not a son of God. The sons of the DAC confess that covenant instead which perhaps should be called the ACC, the AntiChrist Covenant. They are weeds. They are of a different sort to wheat]

The antichrist, Satan, denies Jehovah and Jesus. His sons, the antichrists, the sons of the DAC, being in his image, also deny the Father and the Son in the form of Jesus and Jacob in the covenant tree of the ARC. The family trait is to deny both the Father and the Son. 

23 Everyone that denies the Son does not have the Father either [if you deny/break/abandon your spirit baptism you are not going to be sealed into the ARC]. He that confesses the Son has the Father also [if you keep/confess your spirit baptism you will eventually be sealed].
24 As for you, let that which you have heard from [the] beginning [of Christianity, the gospels, the equivalent of the teachings of Moses] remain in you. If that which you have heard from [the] beginning remains/abides in you, you will also remain/abide in the Son and in the Father [Remain in Jacob and abide in Jesus. Everyone who enters into the ARC remains in it for it is a sealing covenant] .
15 Furthermore, this is the promised thing that he himself promised us [in the message you heard from the beginning of Christianity, his ministry as recorded in the Gospels], the life everlasting [the blessing of the ARC].
26 These things I write you about those who are trying to mislead you.
27 And as for you, the anointing that you received from him remains in you [you are keeping your sprit baptism. Humans who have no angelic bodies cannot be antichrists, since Christ is an angel. They are an irrelevance in this regard], and you do not need anyone to be teaching you; but, as the anointing from him is teaching you about all things [therefore the anointing is by holy spirit which teaches us through our associated angel through our subconscious], and is true and is no lie, and just as it has taught you, remain in him.
28 So now, little children [all ye saints], remain in him [as his wife through the 1NC], that when he is made manifest we may have freeness of speech and not be shamed away from him at his presence.
29 If you know that he is righteous, you gain the knowledge that everyone [of ye young and little children of verses 18 and 28, i.e. those who have been born again] who practices righteousness [under the baptism test] has been born [out] of him [into the ARC. He therefore becomes your eternal father] (1John2).

The point here is that plenty of unsanctified water baptized brothers practice righteousness. Righteousness is not the exclusive preserve of the saints. But among the saints, those who practice righteousness become sons of the ARC. The scripture does not say that those who do not practice righteousness are sons of the DAC/ACC. This is because some unrighteous behaving saints are sons of the ACC, weeds, and others are rotten sons of the JAC, corrupted wheat.

6 And this is what love means, that we go on walking according to his commandments. This is the commandment, just as you people have heard from [the] beginning, that you should go on walking in it.
7 For many deceivers have gone forth into the world [abandoning the commandments above and leaving the church], persons not confessing Jesus Christ coming in the flesh [The 1NC saints descending as humans. The JWs believe that Jesus has already come invisibly and angelically in Kingdom power. They do not confess him as coming in the flesh in the last hour]. This is the deceiver and the antichrist [one who joined the true church was sanctified into a spirit covenant].
8 Look out for yourselves, that you do not lose the things we have worked to produce, but that you may obtain a full reward [it is possible to fail your spirit baptism test yet pass the faith baptism test and become a citizen in the Kingdom without an angel. It is also possible to fail your baptism in such a way as to lose everything. That is the antichrist and the one who has sinned against the holy spirit which means he has discounted an obvious physical proof of the kingdom and therefore lost the opportunity to be save by faith].
9 Everyone going before/previously [into the first church of a presence] and not remaining in the teaching [new updated and latest. Churches stop researching and teaching new doctrines but Jesus does not. The church stops listening to Christ as the tutor. Loses Jesus as a tutor] of the Christ does not have God [referring to the status not the person because there are actually two persons with this status. It could have said does not have the father for example. If you stop listening to the new understandings continually being taught by the Christ, i.e. if you remain in a church with no new understandings, then you lose not only the Christ but also God. In this case you lose every reward.]. He that does remain in this teaching [the teaching of the Christ] both the Father and the Son has [as a God - This is Gnostic. It could have said: Has the Father and the teaching of the Christ. It could have said: Has the Father and the Son. But it says: Has both the Father and the Son. Family relationship - Jesus has the name above any other and is the only begotten son of God who is a God. He that remains in the teaching of the Christ will eventually discover that the Christ is a God like Jehovah and so he will have both the father and the son as Gods to be worshipped. This being a teaching of the second church in each presence. Jesus is the son in the sense that he the one son of God who is a God, he is the only begotten God. He is the only divine son of a divine father and was at the time that John wrote this letter].
10 If anyone comes to you [in evangelism not socially for a cup of tea or to read the gas meter] and does not bring this teaching [namely that both the Father and the Son are Gods], do not receive him into your home and do not say a greeting-as-a-christian-brother to him [deny him any religious status. But you can say hello how are you and would you like to talk about the football. Or you can evangelise to them but not the other way around] [The true church of the last hour is defined by its knowledge and worship of both the father and the son. All other churches worship 1 or 3 Gods].
11 For he that says a greeting to him is a sharer in his wicked works (2John)

So do not receive any evangelist (coming as an evangelist to you) into your home unless he confesses two Gods, the Father (Jehovah) and the son (Jesus). If he confesses only one God, then do not let him in. If he confesses a trinity of Gods then do not let him in as an evangelist to you. If he confesses the wrong number of God, i.e. is a Catholic or a Born Again or a JW or a Mormon etc. and he wants to come to watch the football - fine!

1 Beloved ones, do not put faith in/ believe every spirit, but examine the spirits to see if they are out of/from God, because many false prophets have gone forth into the world.
2 you [shall] know the spirit of God by this: Every spirit that confesses Jesus Christ as having come in the flesh is out of/from God [everyone who confesses that the 1NC Kings have descended in the last hour is a saint],
3 And every spirit that does not confess Jesus, is not out of/from God [there are no non Christian saints]. And this is the [spirit] of the antichrist which you have heard is coming, and now it is already in the world.
4 you are out of/from God, little children, and you have conquered them, because the [one] in you is greater than t he [one] in the world.
5 They are out of/from the world; due to this speak out of/from the world and the world listens to them.
6 We are out of/from God. The one knowing the God listens to us. [The one] who is not out of the God does not listen to us. From this we know the spirit of the truth and the spirit of the deceit [a specific deceit denying that Jesus is coming or has come in the flesh] (1John4).

21 Accordingly, when he caught sight of him, Peter said to Jesus: Lord, what will this [man do]?
22 Jesus said to him: If it is my will for him to remain until I come [in the flesh! Hence John survived until the last hour when this occurred], of what concern is that to you? You continue following me (John 21).

The way to understand this is to realise that the messiah must come in the flesh of his wife to pick up his church, their kids at the manifestation after the presence. If you deny this messianic finale, you deny that Jesus is the Christ, for that is what the Christ must do. So anyone who says that Jesus is the Christ but denies that he will come in the flesh of his wife to pick up his children, the church of Abraham, is a liar. One must consider both 1 John 4 which shows that we confess Jesus as having come in the flesh, as well as 2 John 7 which shows that we confess Jesus as coming again in the flesh. Of course we must also confess that Jesus is the Christ, but that is just words.

They went out from the true church, they were not of the sort who get sealed, they were of the sort who go rotten or were dead in the first place. They went forth from the true church into the world. Rotten saints, dead faithless Christians, not political leaders.  

Today, contrary to the ludicrously ill informed internet speculation by bible belt Christians, some of whom believe that HRH Prince Charles is the antichrist - doh! antichrists are still anointed Christians who deny the son, who mediates their sainthood. They are denying their husband and their fleshly relationship with him through the marriage of their covenant. They are therefore saying he did not come in the flesh. The thing is that, said son can be Jesus, the mediator of the first new covenant in the case of the rotten 1NC saints or Gordon in the case of the rotten 2NC saints, the mediator of the second new covenant! For there are three parallel accounts of the dove descending on Jesus and God speaking:

16 After being baptized Jesus immediately came up from the water, and, look! the heavens were opened up, and he saw descending like a dove God's spirit coming upon him.
Look! Also, there was a voice from the heavens that said: This is the Son of me, the beloved, in whom I have delighted [or whom I have approved] (Matthew 3).

10 And immediately on coming up out of the water he saw the heavens being parted, and, like a dove, the spirit coming down upon him.
11 And a voice came out of the heavens: You are the Son of me, the beloved. In you I have delighted [or I have approved you] (Mark 1).

21 Now when all the people were baptized, Jesus also was baptized and, as he was praying, the heaven was opened up
and the holy spirit in bodily shape as/like a dove came down upon him, and a voice came out of heaven: You are the Son of me, the beloved. In you I have delighted [or I have approved you] (Luke 3).

In the literal meaning, all three are Jesus and the holy spirit corporeally as/like a dove represents the angelic possession by Michael of the human body of Jesus.

In the first word symbolic thread the three sons are Paul, Russell and Ritchie, the other 3 cornerstones of the temple of all Christianity. We too have associated angels, being born again at our commissioning by God to build the 2nd, 3rd and 4th true Christian religions. The son of Matthew is Ritchie since God is speaking to everyone when he says: This is my son, whereas he is speaking to the son himself when he says: You are my son in Mark and Luke. The son of Luke is Paul because for Paul and Ritchie the heavens were opened up, but for Russell, the second part of Jesus' wife, the heavens were parted, just as the temple curtain was torn in two. So Russell is the son of Mark.

In the second word symbolic thread, the beloved of Matthew are those sanctified who enter TCC4, the sons of the 2NC (kings and lords). The beloved of Mark are the second presence 1NC saints in TCC3. The beloved of Luke are the sanctified who enter TCC2, the sons of the ELC and the HLC.

So in all there are 3 more beloved sons who are cornerstones with three more groups of beloved sanctified sons who are living stones.