This video from College Humor lays out -- pretty convincingly -- all of the reasons why religious people are nerds.
After watching this video, I too am convinced that religious people are the biggest nerds around. Not even a lot of the most devoted Trekkies have entire sections of dialogue from Star Trek Episodes memorized word-for-word, and they also don't try to psychoanalyze it either to determine the exact state of Mind of James Kirk or Jean Luc Picard.