This is a great blog entry, and probably an interesting book. It explains why Democrats and Republicans spend so much time beating up on each other, and why people can become violent at sporting events.
Naive realism, as the author defines it, is believing your thoughts and perceptions are true, accurate and correct. “Therefore, if someone sees things differently than you or disagrees with you in some way it is the result of a bias or an influence or a shortcoming. You feel like the other person must have been tainted in some way, otherwise they would see the world the way you do – the right way.” We tend to think of the “other side” as simple and ignorant.