The Anti-Christ Is ...

Who hath ascended up into heaven, or descended? who hath gathered the wind in his fists?
who hath bound the waters in a garment? who hath established all the ends of the earth?
what is his name, and what is his son's name, if thou canst tell? Proverbs 30:4

The Anti-Christ Is ...

... all faiths that don't believe in Christianity.

Who is a liar but he that denieth that Jesus is the Christ? 1 John 2:22a

... whomever denies their separate identities and allegiance to both.

He is antichrist, that denieth the Father and the Son. 1 John 2:22b

... those who believe Jesus' coming is some variation of appearing in the atmosphere.

And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world. 1 John 4:3

For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist. 2 John 1:7

and it could be you.

Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time. 1 John 2:18

Let God be true, but every man a liar; as it is written,
That thou mightest be justified in thy sayings,
and mightest overcome when thou art judged.

Romans 3:4