> There is no "THE Antichrist" there are only antichrists, plural

Funnily enough, the bible agrees, or at least John's epistles.

People who fantasize themselves as the antichrist (like Thiel, he's not very good at hiding it) ought to remember that antichrists being a dime a dozen is quite biblical.

Not completely true, the bible mention "antichrists" as in many and a particular "The Antichrist". The Antichrist is supposed to be the apex of the hubris.