Well worth a read. Brendan McGinley is by way of being a mate of mine, and since his bonus is tied to traffic, I'll not excerpt. Your choice to read it or not.
http://www.cracked.com/blog/4-modern-sins-pretty-much-every-american-guilty-of/#4. Staying Misinformed
#3. Stereotyping and Demonizing the Opposition
#2. Everyone Has to Be Right All the Time
#1. We Don't Have a Sense of Humor About Ourselves