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.
It's actually based on the life, words, and deeds of the Man, Jesus of Nazareth. The Jewish Bible just happens to have predicted and promised His coming. But where's the delusion? The eyewitnesses to Jesus's ministry? The early church which was taught by those eyewitnesses? The modern church that believes the written accounts of Jesus and the expositions of His earliest followers? Which part of Christianity is a delusion, and when did that delusion come into play?
First of all, I didn't even bring up the topic of God; I merely pointed out that Christianity is based on Jesus and not the Jewish Bible. But you apparently answered my question as to the delusional part. Your answer appears to be "all of it." Fair enough; that is an answer.
My reply would require a bit more probing of your reason for objecting to this premise that Jesus is the divine nature in human form. Is this because you do not believe in the divine person aka God? Is this because you do not believe the divine person has the ability to inject Himself into the human condition? Is this because you believe in God and that God could certainly do so but that you do not believe that Jesus provides enough evidence that His claims of divinity are true?
Where do we fall on that spectrum?