I know this is a concern of a lot of the tribes,but I will never understand why. It has been a well-known fact since the beginning that the various "Indian" tribes weren't all from the same genetic stock. Some Indians WERE white,some were actually black without African features,and some were the traditional "red man". Even proving that Kennewick man WAS white AND the earliest remains found only proves he is the earliest remains found. It doesn't mean others with other genetic backgrounds weren't here earlier than him. Or even at the same time.
In fact, so attractive were the Indians of the Massachusetts Bay Colony, that the young fellows among the colonists were actually (according to one theory) the cause of thr first Indian troubles. Seems they were a little too interested in the attractive maidens among their aboriginal neighbors