What's wrong with white supremacy? There is white supremacy and there is black supremacy. And either color can be part of either "supremacy" depending on their viewpoint.
Then they have to find an obsidian mountain and chisel out their Black Heroes, like St Floyd and Rodney King and the litany of sainted martyrs. Leave Rushmore to the Americans, chisel your own mountain and we promise that we won't take it down.