The Christian faith hinges on one proposition, and it is, to put it as Keith Green does in his rendition of the "Easter Song", "Jesus Christ is no longer dead (Glory to God, He is risen, Hallelujah, etc.)." Jesus Christ is no longer dead, if someone is to break Christianity, they need to break this proposition, and anti-Christians forever have tried to do it.
Actually I think that's untrue.
The Christian faith hinges in fact on the proposition that Christ is God, i.e. that he was the divine being in human form, rather than just being a plain old (though remarkable) human. If someone wants to break or dispel Christianity they need only show that Jesus was an ordinary man, not God.
This was addressed in the book "The Holy Blood, The Holy Grail" which claimed that Jesus was just a man, that he married Mary Magdalene, had children like any normal man and thus had a bloodline stretching down history. That theme was also reflected in various other books not least the well known "Da' Vinci Code" by Dan Brown and the subsequent film of the book. The Gospel of Philip also aludes to this proposition in its passage that relates Jesus kissing (often) Mary.
Once you take the divinity out of Christ the doctrine of Christianity crumbles very quickly which is why of course the extra Gospels were deemed by the Church to be wrong or unsitable for the Bible whatever excuse they chose to use.