My office mate who is a wonderful person but very very misguided politically and culturally was talking in his office to a very successful black woman. He started in on some liberal bs about the horrible white man and Indians. I mentioned that I had two Native American ggggreat grandmas and the woman, who had been looking totally bored, brightened right up and we started chatting, totally ignoring Pat. hehe. I've had that happen before. You ignore the lecture from whomoever on whatever and connect directly to the person who in this case, also had Native American ancestry. We bonded in about ten minutes.
I tell those people that it isn't too late to make up for it. They can donate everything they own to the local tribe, and perhaps they will feel better about themselves.
No takers.