Without a doubt, their were atrocities on both sides. To try and decide which side acted first, is next to impossible. In those days, you got your point across with brutality. Since neither side really understood the others lifestyle or reasoning, talk was next to useless.
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Plenty of blame to go around, but the side who managed to be more brutal than the other, usually came out the victor. Pretty much how things work out with the "Ultimate Fighter" contests.
If you are looking to assess blame to the whites, you will find plenty of cases to back up your argument. On the other hand, if you are looking to assess blame to the Native Americans, you will also find plenty of cases to back up that position. Personally, I come down on the white boy's side.....being white. On the other hand, I can appreciate the Indian's side of the debate.
I was working on a power plant outside of Farmington, NM and large group of us were sitting around having our lunch. Five or six Navajo elders were sitting against a wall. A young man came up, for some reason, and asked me...."White man, when are you going to give us back our land?" I replied: "Well, we kicked your ass and took the land. When you folks get around to kicking our ass, you can get it back".
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All of the elders just nodded their heads. That's how things worked in the real world.
Good luck,
Joe Ribaudo