Frankly my school years where things like that were taught were not my best era of listening to teachers. I learned most of what you brought up in talking it over with my sister who put in a lot of effort to know about this particular topic. Andrew Jackson in particular was awful to the indians in the SE area of the US.
So, the only problem you want to negotiate in your education is about the Civil War. Which, then doesn't stand up the scrutiny.
You know quite well what it means but using stupidity doesn't work. Try once again to prove your point about what you were "not" told during your years in school. Or, admit your point is moot. Which it is, completely.