There's a story about Cassius Clay which pretty much sums up what americans attitudes are really like. You all can guess or look up what I'm talking about. It seems like stupidity has more and more become the most common defining trait of the american people.
It's a horrible attitude. I don't think you should base all people becuse of race, religion, region, etc. There are good and bad people.... none of the previous things will let you know if someone is good or bad.
I suggest opening your mind look into positives about people and how differences in culture can be a great learning experience.