One of the prereqs I had to take ahead of nursing school was an early US history course, which focused heavily on how we treated Native Americans.
I already knew it was bad before that class. That 'already knew' was barely a scratch on the tip of the iceberg... and that class was a 101 level dip-your-toes-into-the-content-to-try-it-on but didn't go too deep into any one topic... so... maybe a solid dent in the tip of the iceberg? We are not good people.