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.
“If it's free, it's advice; if you pay for it, it's counseling; if you can use either one, it's a miracle.”
“Chemical and biological attacks are scary and will kill a lot of people but don't rise to the level of nuclear.”