When people are highly religious I think they are less intelligent.

I read a study that concluded that people with high IQ's were more impressionable to hogwash than average people. Intelligent people tend to be arrogant about their intellect, and believe they are immune from believing anything that can't be true. In the study they would over compensate for their intelligent too often. It doesn't take much to bait someone, anyone, when they want what they hear to be true.