I've become convinced that people in needless movements simply want an enemy. A big bad they can blame all their problems on, and convince themselves that they are important because they're fighting them. They want to give their lives meaning, so they imagine something that does. Like people did with the Roman and Greek god of legend, people wanted to explain the world around them, so they created Zeus and Hera. When people wanted to not feel insignificant they create BLM.