Earlier quoted context omitted.
So presumably, if some foreign power invaded the US next week, violently exterminated most of the population, and herded the survivors into a few tracts of land, you would be fine with that? After all, land changes hands continuously.
Not at all. Nor am I "fine with" what happened to the natives. All I'm asking is, would it be any major abberration, considering human history? Or would it just be: after atrocious violence and savagery, land briefly under the control of vague human entity X now seems to be under the control of vague human entity Y, episode #37,093,840?
Moreover, if there was official recognition of what really happened, even now much could be done to redress the original injustice and give these people some closure. Instead, schoolchildren are taught a sanitized version of American history which really adds insult to injury, from the point of view of the surviving natives.