>... If we are to call Native Americans "American Indians" then what are we supposed to call people from India who have taken up citizenship in the United States?

We are all Americans. Labels only contribute to barriers and walls, and hyphenating youself is a form of alienation. I am not sure who to attribute this to, or if it is exactly quoted, but it has more than a modicum of truth, "The best deterrent to bigotry is excellence."