Asking Blacks if they find the confederate flag offensive is like asking Jews if they find the swastika pleasing to the eye? It is pretty obvious that blacks as well as other minorities find the rebel flag offensive.
Many years back I was assigned to photograph a Klan meeting. It was a surreal moment for me seeing the cross burning and the confederate flag waving in the breeze and listening to the chants of burn all "N*****S ". I sort of take offense to lynching and burning, and it is hard for me not to disassociate the rebel flag from the Klan or various other white power groups that I have photographed in the past all who seem to worship the rebel flag in as much as they respect the swastika or a burning cross.