Jews and Indians (and DNA)

I have an acquaintance who believes that he is an Indian. He believes that the Great Spirit changed his DNA, and that he is now a "real" Indian. Why? Because, only actual Indians can speak with the Great Spirit? Because, only Indians can heal though song and ritual? hmm .. what gives a race of people a right to deny their religion, customs or way of life to any other human being? If a person feels their soul being draw toward a certain group of people, they should be allowed to join with them in full fellowship, or practice in solitary as they wish, saying that they are what they are, without the need to have their DNA change in order to legitimately belong to that group. Of course, there is a difference between a person who has been born into a culture, and a person who adopts it later in life. But, even this is a false barrier, for there are newcomers who out -shine those who have lived inside the system their entire lives - it is the fact that they are new that gives them the insights and determination that many lifetime members lack through a sense of complacency and satisfaction with the way things are.