Native Americans had wars, genocides, and slavery long before Europeans arrived. The tribe that currently owns the Black Hills were not its original owners. They were given it by the U.S. government because the original owners were wiped out by another tribe. I told this to a Native American once and all they could do is get angry at me, but not refute it.
Arizona was in the middle of Navajo/Apache invasion.
Those warrior tribes originally from as far North as Canada invaded Southwest and were in process of whipping out it’s natives.
Tribes like Hopi or Tohono would not exist today, if not for the Europeans.