There are a lot of "fundamentalisms" that have nothing to do with deities, either. The superiority of the collective over the individual. The inherent superiority of one race/tribe/color/younameit over another*. There are others, but these are the first ones that come to my mind.

*Frankly, I think most religions have been twisted to serve this age-old human trait. There seems to be a lot more xenophobic Arab culture in Islam than there is of the word of Allah, and in medieval times, Christianity was a lot more about European miltancy and cultural aggression than about the teachings of Christ.

Even in the quiet of a Buddhist monastery, is there a monk who has not had the thought steal into his mind that somehow, monks are just better people than those farmers down at the bottom of the mountain?