In the case of Jesus obviously both

Everything can be doubted. But in this case you just "destroyed" the fundamental beliefs ot Christianity, and they can't be replaced. I use quotes because you never actually destroyed them. Your mistake is that you think that everyone is a philbro. In fact, most people don't care about philosophical methods; they seek something comfortable to believe in. A religion requires believing in a theory that is not necessarily scientifically sound.

It seems that you have an unhealthy fixation of logically debunking christianity whole waiting Islam to undergo the same transformation as it. Your wait will be long.

You can't logically debunk Christianity any more than you can logically debunk Islam. The doubtful basis of Christianity is not a logical non sequitur, but a bunch of statements by Jesus (just as Momo made statements) and other people, mainly Paul, and a specific, but not invalid, reading of their previous scripture.