Who are we to Judge?

In class, we had talked about sterotypes and this not me thinking...Americans tend to judge very easily, not only by making serotypes but basically first impression is everything to americans. First impression meaning how you look, act and speak to them. All though a lot of americans judge people on looks rather than how they are as a person, coming to the conclusion that most of us are pretty materialistic... come on you cant deny that we are. Its nothing to be ashamed about , its just a matter of thats how we were raised, we are a product of our previous generations. But the more i thought about this i figured, americans are so quick to judge each other and i see how some treat other people within the same culture which is with no respect what so ever. So the question is how do americans treat people of another culture? and why do they treat them that way as well. In my opinion i feel that americans treat people of another culture as if they are less then what we are, when in reality we are all just as equal as the other human being.