Someone was living or is living in a country and then some unwanted people show up and proceed to kill all the people currently living there. That sounds like a horrible way to promote a functional society.
I'm not saying otherwise but it was not unique to the Americas and quite common across the world at that point in time. We should be very grateful that the human race has evolved past that - though have we? What are we doing in Ukraine?
We've no business there. Ukraine mistreats Russians who live there. I've seen videos of their bullying elderly Russians and laughing about it. Do you support Ukraine? I don't. Russia either. It's none of my business and I really don't care which side wins but my pocket's being picked to support Zelensky's abuse of Russians within his borders.
The people you're crying for really slaughtered one another and what happened to those red-heads that were uncovered when they migrated here? Hmm. I haven't found out and this archelogical dig is largely squashed by those who want to support the narrative of evil white race. It's hard to even find anything on it.
American Indians were not the saints they're made out to be. They also held slaves and readily bought African slaves and enslaved captured white men. They only lost because they had the inferior weapons. Their bows and arrows and tomahawks didn't stand a chance against guns and cannons.
For part of my family saga, because one of my characters that marries into my family is a Mexican immigrant around that time (one reason I know that immigration has gotten tougher, there's two immigrants in my family and that caused interest in the history of immigration to the US), I researched Mexico around the turn of the previous century and learned many interesting facts.
First of all, I get peeved now that I know it was the Mexican rancheros and vaqueros who taught America how to ranch when histories of the cowboys repeatedly fail to mention that fact. They were ranching - including the cattle drives - for 400 years before we were. So I do understand your outrage.
Another thing I found out is that the Navajo ranged down into Mexico and they and the Spanish settlers also warred. I'm not going to go into detail in this forum because too gruseome but the Navajo were particularly brutal and sadistic to any Spaniards they took captive. So much so that some of the Navajo women could not stand it and would help the Spaniards escape. I used this big time in my story and decided to make his mother Navajo, one of the women who did this.
That's the sad, sad truth. Doesn't mean this land belongs to them. It doesn't. They were just one more conquered people amongst many conquered people world wide. It wasn't right but it is what it was. That's what the times were. Again, they were also migrants. And we actually do not know if they had to kill anyone to settle here. We do know - it's established fact - that they warred one another over the land, constantly conquering and being conquered.
Btw, did you know that Germans and Italians were also interred in camps in the US during WW2, not just the Japanese? Sorry. I'm somewhat of a research geek and writing a story about an American family that spans a century and a half has certainly entailed lots of research and sparked my curiosity. Hard to believe I hated history when I was in school. It's fascinating.