My comments are based in a lifetime of bi-racial and bi-cultural living. I am mostly white, and for most people I look northern European. But I grew up in an American Indian family where my native heritage formed my worldview. When I understood the reality of the horrific genocide of Native people in this country, I spent many, many years trying to understand how such evil was possible. I am sad to say that there are a great many broad strokes that provide the answer, and none of them are good. As Hannah Arendt wrote in her classic essay, evil is banal, it's ordinary, and in the US it has been dominant from the first, far greater than any ideology. Your own response here is to assume that I make sweeping statements that are to be avoided, but the truth is the slavery and genocide were not a matter of individual wrongdoing. They were intrinsic to an exploitive, entitled culture that has never willingly changed on its own, and is still raging among a large portion of white Americans.