There was a wide split in black activism in civil rights movement between MLK's non-violence and Malcom X's go-after-whitey. BLM similarly. The violent side is taking its legitimacy from America's earliest revolutionists and Lenin's statement that real change, for good or bad, comes from the barrel of a rifle. The bad side is enunciated in MLK's book "Why We Can't Wait" Harper&Row. He gave me a copy.