Here is a great quote on fundamentalism by Jimmy Carter....
I define fundamentalism as a group of invariably male leaders who consider themselves superior to other believers. The fundamentalists believe they have a special relationship with God. Therefore their beliefs are inherently correct, being those of God, and anyone who disagrees with them are first of all wrong, and second inferior, and in extreme cases even subhuman. Also, fundamentalists don’t relish any challenge to their positions. They believe any deviation from their own God-ordained truth is a derogation of their own responsibility. So compromise or negotiating with others, or considering the opinion of others that might be different, is a violation of their faith. It makes a great exhibition of rigidity and superiority and exclusion.
Here's the rest of the interview