If the flag of an armed enemy of the U.S. is allowed to fly over government buildings, then it implies that slavery, or at least the threat of slavery, is sanctioned by that government and can still legally exist.
I feel as if I go to Africa, I may never come back. I'm just going to live with the animals and adopt an elephant, and it's going to be my friend.
A man may build himself a throne of bayonets, but he can't sit on it.