Well, I don't know, it just seems, pretty obvious.
The fact that so much people seem to be striken with worrying delusions which seem not to fit with the observable universe, resistance to negative evidence such as the lack of any observable effect of prayers...
Actually, "Temporal Lobe Epilepsy disorder" can turn people extremely religious and practice of religious chants or prayer reduces the frontal lob activity, which in turn augments temporal lobe activity.
Well there's much to tell, but i'm a bit lazy right now.
I do by the way, truly consider most religious people to be mentally ill, this isn't some attempt at provocation and I'm not trying to insult anybody or force my own beliefs onto others.
I don't understand the apparent immunity religious beliefs get when they after all fit all the basic symptoms of a pathological illness using our brains architecture to spread through cultural endoctrination in the form of a complex Meme.