I am very aware and proud of my Swedish, German, English, Scottish, Welsh and who knows what else heritage. Do I get upset by Hagar the Horrible cartoons or jokes about what is worn under kilts? No, of course not.
I’ve come to the conclusion that the more ashamed of their heritage a “peoples” are, the more sensitive they are about it. Why are Indians ashamed? Well, they lost. I guess that’s it.
I think it has more to do with the fact that they didn't consent to the contest in the first place. I have lived on the Navajo reservation for an extended period of time and gotten to know a great many natives there. We might not like to admit it, but they have a strong case. Most of their population killed in wars they did not start, their land stolen in the name of manifest destiny, marched to internment camps like Fort Sumner, and finally herded into worthless pieces of land we call reservations. They absolutely have the right to be bitter.