As I write there's a business where Interstates 4 and 75 meet that is flying an enormous Confederate flag. There are some people who are petioning (whom, I wonder) to have the flag removed, but others are fighting against "revisionism" by insisting that it remain.
"Revisionism" is the practice of denying the past by saying that things either didn't happen, or to down-play unpleasant aspecs of History. We want our children to be proud of their country and their ancestors, so we try to deny slavery.
The other side of revisionism, oddly, is to make children ashamed of the past (why?) we stress the behavior of our ancestors that is judged to be bad today, but was commonplace then. Like slavery. Today, we point to Sudan, Malaysia, and other places where slavery is practiced (loan-shark slavery) and call it evil, so we tell our children that the South was evil, too, as was anyone that lived there. Except the slaves.