Judge not, lest you be judged
It's something in human nature....EVERY society looks for others who are "different" and therefore labeled inferior. In Latin America it is the indigenous people (natives if you will), in England it's the Irish, in Pakistan it's the Hindus, in Croatia it's the Serbians, etc, etc, etc. The town where I grew up had a very large Swedish community and they would make jokes about the Norwegians -- very confusing as they looked alike to me!
When you lay down with dogs, you get up with fleas.
Is not labeling "Americans are all...." (regrettably I've not had the opportunity to meet the vast majority of anything!) "All people who profess this faith are_______", "all of those kind of people are___" not the very SAME behavior?
If you don't like being labeled....don't label! Change the world one person at a time!