Religious people are all mentally ill.
I wouldn't say they are for all religions...
But definitely the "true believers" of the Abrahamic religions, like if you read any of those texts and are 100% onboard its all real. Abraham was a schizophrenic who heard voices that told him to kill his son, had textbook visual and auditory hallucinations and obviously delusions of grandeur. It's so fundamental it's present in all the big branches, schizophrenic symptoms are viewed as a legitimate communication with God that are often commands that must be followed no matter what.
So some well adjusted people see it as "just a story" but if you sit thru that indoctrination your whole life and start hearing voices, there's a good chance you see the voices as religious instructions.