The wild west was very much a kill or be killed kinda place for native americans.
War cries or making god awful sounds aren't limited to native americans, the scottish created the bagpipes for such affairs.. Uncivilized... hmm. You should read about the treatment most native americans got at the hands of the french, dutch, british, and then there was the spanish. There are very few natives in the, north eastern USA or Newfoundland, or the Caribbean now..., at times, rivers and the landscapes were littered with the bodies and blood of these people. Read about the history of Chile, where the rivers ran red with blood, for days on end, as the conquistadors chopped the hands and feet off all the men, and later enslaved whole groups to dig mines. Read about dehumanizing residential schools, and small pox... and how the churches, kings and queens deemed them less than human, how subsequent generations have denied them proper education, housing, medical care or the right to vote, to own property, to parent their own children.
Uncivilized... give your head a shake. There are savages in our history, rarely have the monsters been accurately portrayed.