Say what you will about Joe Biden (or any president, for that matter), but I have to concur with what he says here:
We can’t just choose to learn what we want to know about our history. We have to learn what we should know. We should know about our country. We should know everything: the good, the bad, the truth of who we are as a nation. That’s what great nations do, and we are a great nation.
We have to be honest and tell the truth.
Or, we become something quite different than...great.
Some history about the Lakota Indians...here.