Belief without evidence is natural. Jumping to conclusions based on mere primpitive outdated caveman pattern recognition is natural.
It's natural for us to be irrational enough to believe in bullshit religion. Yes the religions themselves are not natural but the irrationality to believe in them is.
Doubt is natural too but doubt is more effortful. We have to have a reason to doubt something but jumping to conclusions and using our primitive pattern recognition is automatic.
Besides, the article I linked notes that neuroscience supports this view.
It's natural for us to be irrational enough to believe in bullshit religion. Yes the religions themselves are not natural but the irrationality to believe in them is.
Doubt is natural too but doubt is more effortful. We have to have a reason to doubt something but jumping to conclusions and using our primitive pattern recognition is automatic.
Besides, the article I linked notes that neuroscience supports this view.