They won't be debunked whilst people are religiously indoctrinated as children. It's a very strong cultural influence. Children growing up to believe that the holy books and writings foisted upon them are from the one true deity are prone to believe in the existence of half-man half-elephant, virgins in paradise, talking animals or any other absurd phenomena that seem to have happened thousands of years ago but not since. Most religions seem to teach that their own sect is the only true one and that non-believers (aka heretics, apostates and the like) are to be punished by being consigned to Naraka, hell, Hades Gehinnom etc.
It's myopic in the extreme but until children are encouraged to think beyone the confines of their immediate family and community religion will exist, albeit in decline across the board where education in its real sense is improved.