I think that a lot of the more moderate religious people don't take many of the stories in the bible as literal fact. Of the few religious people that I know well enough to ask such questions, not one of them truly believes that the worldwide flood actually happened. The Garden of Eden and creating Eve from Adam, though, is a truth in their eyes.

But for the purposes of your discussion, I would be willing to bet that there is already a group somewhere that still believes that old Mythology is true. Of course if such a group does exist, the higher-ups in religious circles would probably be smart enough to realize that if they go around criticizing them, their own religion would lose all credibility.

There are still people who believe that the earth is flat FFS. If an otherwise intelligent being can be made to believe that, despite all the evidence to the contrary, I think it is safe to say that someone, somewhere believes everyt ridiculous thing.