People forget what this country, and other countries did to their indigenous people...
Indigenous people are just those who were king before the last group became king. American Indians had three distinct waves of people whose DNA were so different they can still be tracked. One wave usurped the next wave. And smaller waves existed as well. There were even mash-ups. Where a wave may have been a combination of two earlier waves.
From the beginning of man there has been the law of survival of the fittest. That law is true of humans and every other animal. A frog eats a small snake, a larger snake eats a frog. There is no moral imperative other than to survive.
The most unnatural thing about modern man is our concept of including all men as equal with rights. That is very new. And no one of any race or tribe is not descendant of a conquering civilization, descendant of a slave and of a master.
If you're trying to justify what the U.S. government did to the Native Americans who existed in this country at that time, or what the British did to the Scots, Irish, Welsh, and the rest of the people in countries they colonized, please hold your breath.