Quite a few blacks fought for the Confederacy. It was their battle flag, too. Blacks pretending to be offended by the Confederate flag are just playing racist politics.
And why did you call them, "bitches"?
Back then blacks were slaves in the South and had no choice but to fight with their owners. If their owners told them to fight for the Confederacy do you really think saying no would be an option to a slave?
Felt like it.