There were plenty of regional wars among the native Americans. None of them resulted in widespread genocide and construction of concentration camps and reservations. In the initial Spanish 'not western colonization' nearly 8 million people died. By the 1900s there was nearly an 80% reduction in population and western populations were in possession of their resources.
Western nations came, they defeated their enemy, and they took their territory. What else do you call that?
None of what you said refutes my first point. All your points are valid, just missing broader context. 'Native American' history didn't begin when Europeans arrived. Seems to all boil down to, people A did X bad things to people B thus people A are responsible for demise of people B, while ignoring everything else that occurred with people A - who by the way are only viewed as A by people B.
> Western nations came, they defeated their enemy, and they took their territory.
The various tribes also engaged in near constant warfare with each other, defeating them, taking their territory, and making the rest slaves. Cortez was only able to defeat the Aztecs because he was able to enlist the aid of the non-Aztec tribes, who hated the Aztecs because of the depredations of Aztecs against them.
The Inca empire was only recently formed before the Spanish arrived.
In North America, the Commanche carved out an empire in the south at the expense of the tribes that had been living there. See "Empire of the Summer Moon":
https://www.amazon.com/Empire-Summer-Moon-Comanches-Powerful...