I'm actually, to use the words of someone else here, posting another 'historical narrative"!

It is largely downplayed and ignored by the "Nobel Savage" adherents.  They also ignore the wars between the Nobel Savages or the cruelty of many of their "First Peoples" in their enthusiasm for white guilt.

And many of the blacks in this country were the famed "Buffalo Soldiers" post Civil War who were killing the plains "Indians" as part of their jobs to ensure the land takeover,  so perhaps there could also be some "Black Guilt" tossed into the 'historical narrative' as well!