Here's a chance for white folks to prove that they've banished racism: Recognize the facts that the Confederacy was no better or different than the Nazi empire, and remove all state-sponsored celebrations of it. Supporting that flag and its leaders can, in my assessment, be justified on either of two grounds: ignorance of the facts, or devotion to white supremacy. I believe that most whites who celebrate the confederacy are simply ignorant of the facts, and have not opened their minds to this subject.
Here some politicians address the flag problem in South Carolina. But removing the flag from state property represents only one step among several required to rectify this situation:
1. Remove confederate flags from all state-sponsored property or activities.
2. Remove statues as well, placing them in museums.
3. Replacing those statues with statues to people who fought the confederacy, fought for black liberation, or otherwise fought against slavery and for racial equality.
4. Rename schools, streets, and counties in a similar fashion.
By the way, I oppose any measures to ban private citizens from celebrating the confederates or the Nazis, such as Harvard's ban on swastikas and confederate emblems. I do support challenging such people in public, however.