Of late, I’ve read several books about Custer and the Battle of the Little Bighorn. “Son Of The Morning Star” and several others. In those books, the authors do not omit or attempt to rationalize the savage practices of the Plains Indians towards their enemies. I wish those books could be standard reading in college history courses...even though a few of them are obviously biased towards the Indians.
I get annoyed when people make fun of the 7th Cavalry, because they were American GIs fighting for us, and I usually ask how the American POWs were treated by the victors in that battle, as people so enthusiastically praise the Indians as the good guys and almost heroes.