The preexistence of some savage prehistoric hunter-gatherer tribes is insignificant to the history of civilization. They were doing nothing with the land except existing on it like children accepting whatever nature provided for them. Our ancestors built the greatest civilization in human history here and when the savages started attacking the settlers, yes they sent the army after them and forced them into reservations. They could have rightfully just wiped them off the face of the earth, but they carved out a place for them to exist, and their descendants are now benefitting from this civilization. No apology is necessary. Greatness does not apologize.