I would push Dawkins's argument further. Take a given divine "fact" X held by members of some religion. Most individuals who are not part of the religion in question will typically view the belief as outlandish. Hence, a belief that would otherwise be considered a sign of mental illness is perfectly "logical" when it applies to one's religion.
The evolutionary biologist and renowned atheist Richard Dawkins has lucidly pointed out that many religious beliefs would constitute signs of mental illness (e.g., schizophrenia) if these were not cloaked in the drapes of divinity. Take a supernatural belief rooted in religious doctrine, and call it divine "fact" X. If it is part of a person's religious narrative, it constitutes a belief that must be respected (and for one particular religion, one should not even criticize openly any of its belief system...no I am not referring to the Amish). However, if an individual held the same belief X, without it being part of a religious narrative, the individual holding this belief would be met with derision (if not concern for his/her mental wellbeing).