The Antichrist phenomenon is generally misunderstood - not least because, as preparation for 'his' coming, false understandings have been seeded through popular culture for several decades.
Father Seraphim Rose first made clear to me what Antichrist is, in his essay concerning the Signs of the Times - meaning the End Times.
The Antichrist is not the overt and obvious enemy of Christ. Instead, the essence includes that the Antichrist presents 'himself' as the friend of Christianity, and operates via subversions and inversions of Christianity.
This is why it was prophesied that most of those who regarded themselves as Christian will be taken-in by the Antichrist, and thereby will find themselves unwittingly taking the side of evil in the spiritual war.
But all this is rather abstract - and sometimes it is useful to have a concrete illustration of how the Antichrist works: and WmJas Tychonievich has provided one in a recent blog post.
If you were confused about the sort of thing that Antichrist does; then Just Remember This.
Once seen (I hope!) Never Forgotten...