The ones I've known preferred to be called "Indians." Local tribes warred on each other regularly. Jamestowns look down on Elwhas and both disparage Makahs. When the first whites in Puget Sound set up their village on Alki Point the local Indians moved next to them for protection from Haida and Tlingkit raiders who regularly plundered them for slaves. Stories of cannibalism are told. The Blackfeet were the most feared tribe on the plains, and they regularly terrorized their neighbors. The Black Hills changed hands between tribes warring on each other many times. You got a problem with the American Indian Movement? 
http://aimovement.org
My point is that Indians were being killed and displaced from their land by other Indians long before whites arrived. We just had better weapons to do it. As soon as they could tribes like the Blackfeet acquired guns to make their own wars on other tribes easier and killing other Indians more efficient. The whites diseases killed more than wars however.