That would be an excellent question to ask Ms. Cullors and her "trained Marxist" friends who started BLM. (And while you're at it, maybe ask them who trained them.) I'd also ask in what way things like toppling statues will help how blacks are treated by agents of the government. And ask why they're so concerned with "agents of the government" when they treat each other much, much worse.
We might get a clue straight from the horse's mouth - Marx himself in The Communist Manifesto:
In short, the Communists everywhere support every revolutionary
movement against the existing social and political order of
things.
...
They openly declare that their ends can be attained only by
the forcible overthrow of all existing social conditions.