This is nothing new, they did similar shit in 15/16. The right using them as a fear mechanism caused the popularity to hit its height during the Floyd protests. They're supposed to be a localized grass roots movement, they're not. No money in local decentralized agitation, which is their only real purpose.. BLM isn't always BLM the group, sometimes it's just a catchy repeated hash tag.
They may be far more anti-pub, but they're not as pro-dem as it's made out to be... sure they're leftists if you want to put a binary label on them, just as Hamas/Taliban/Isil are religious, conservative minded authoritarians on the right.
Currently, this is just attention whoring. They want a moment in the lights.. because they've been ignored for awhile .. and to get paid.