While I agree with you on the delusional, facts would seems to prove us wrong, IanS.
Just look at the number of people in the States, according to the stats available, who believe the biblical account of creation trumps the BB and the known evolution of our planet.
I personally know at least one Christian who firmly believes anything that appears to contradict the story of Noah's Ark is a devil's snare.
That's not a comparable situation though.
Evolution does not explain (and does not try to explain) how life began from non-living chemicals (personally I think the answer is fairly obvious, but that's a different thread entirely). So the church can easily maintain, as indeed it actually does, that although it now accepts that species evolution is true, nevertheless they say that God set the conditions in motion such that life could and would necessarily be the result.
In that same YouTube video that I mentioned above where Richard Dawkins interviews the Archbishop of Canterbury (Rowan Williams), that is precisely what Rowan Williams claimed. He said, and I quote from memory
"Evolution, it's a perfectly good theory, but it is God who set everything in motion, so that all life would arise from that”. Ie he is saying that evolution is really irrelevant, because its is God who produced evolution so that it would lead to all life on earth.
The same is true of the BB - science now has a very good description of the BB, right back to within almost the Plank Time (10*-43 sec. after the “bang”), but we do not yet have a really clear or agreed explanation of why the bang happened or why the energy conditions existed in the first place (though again, personally I think the most recent published explanations of Hawking, Vilenkin and others come very close to that). So devout theists can easily continue to argue that quote
“science cannot explain what caused the bang, and we say God is the cause”.
Creationists, ie just fundamentalist Christians and Muslims can argue like that indefinitely. Or at least until such time that science establishes the explanation for life and for the complete origin of our universe to the status of
“Theory”. At that stage, what happens is that, as I actually said above, really devout current day theists do of course continue to deny absolutely everything, but
eventually it gets to the stage where the church itself cannot continue to deny such things without losing all credibility … thus for example, the Vatican only quite recently made statements saying it does now officially accept that evolution is true (that took 150 years).
But all of that is very different from a situation in which the specific figure who underpins their preaching of the bible, is found to be fictional. If Jesus is agreed to be fictional, then the entire basis of the church teaching & it's belief, disappears.
The church could try to distance itself from a fictional Jesus, as if it had not for 2000 years used that as the sole and entire basis of it’s existence, and claim instead that the figure it’s beliefs were really based on was God himself, and where an imaginary God of that type is literally impossible to disprove (you can’t find direct evidence of a God’s non-existence). But that would make a complete mockery of everything that the Christian church had claimed and preached for 2000 years where it has maintained that it’s entire reason for existence is that Jesus existed as described in the holy bible, and where people like Paul and the gospel writers really did know about a messiah from God who walked the earth at their time …
… the church could not continue to maintain that it’s sole and entire message, ie the preaching of absolute truth in Jesus and the holy bible, should still be believed by everyone, even though that same church was also saying the story was fictional.
It could, as I say, try telling people that they must now believe only in God and ignore what for 2000 years it had always sworn was the absolutely essential message & divine truth of Jesus Christ and the Holy Bible, but that would leave the church in a position of such undiluted hypocrisy and openly admitted deceit so blatant that it would be very difficult (understatement of all time lol) to attract new generations into believing an admitted dishonesty so obvious and undisputed even by the church itself. That would be an utterly absurd position for the church, and an absurd position for anyone here to deny.