The official BlackLivesMatter page apologized and said that they weren’t affiliated so you can stop spreading false bullshit now
Also remember that even though they weren’t affiliated Bernie Sanders got in contact with BlackLivesMatter, asked if there was anything he could do to improve, found out what he needed to work on for their support, and is in the process of working on it. He even hired a member of BlackLivesMatter as his press secretary.
So the guy listens if you get his attention, so even though the protestors weren’t a part of black lives matter they got his attention, got him to release an actual plan for what they were protesting for, and that plan is getting approval from BlackLivesMatter.
Name one politician who has EVER done that?