From St. John's 2nd letter he says:
"For many seducers are gone out into the world, who confess not that Jesus Christ is come in the flesh: this is a seducer and an antichrist."
Such "mini" antichrists who deny Christ and practice deceit are the likes of Justin Trudeau, or Gavin Newsome, or Ben Shapiro. I am sure you could name more historically.
Eventually, we'll get the big antichrist as per Revelation. But the word "anti" means against, so anyone who works against Christ, and uses deceit and seduction is an antichrist.
Over half of world's jews followed fraud messiah in 1666.
Sabbatai Zevi (Hebrew: שַׁבְּתַי צְבִי, romanized: abbĕṯai Ṣĕḇî; Turkish: Sabetay Sevi; August 1, 1626 – c. September 17, 1676), was an Ottoman Jewish mystic and ordained rabbi from Smyrna (now İzmir, Turkey). A kabbalist of Romaniote or Sephardic origin. Zevi declared himself the Messiah in 1666, proclaiming that redemption was available through acts of sin.