I think that supernatural belief is irrational and people who insist that it represents reality are delusional. They only become stupid when they invent Heath Robinson machines of rationalisations to justify their beliefs, all to avoid the far simpler and less convenient truths.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'