Positive things? The road to hell is paved with good intentions, and that idiom doesn't even fit because BLM wasn't started with positive intentions to begin with. Sure, are there good people in the movement, of course, there always is, but it's not a movement concerned with logic or truth, it's just blindly pushing the narrative its puppet masters tell it to push.
"Hands up don't shoot" was founded on a lie. Soros and his group saw an opportunity to destabilize and divide and they jumped at the chance by creating an astroturfed movement whose very name is designed to create a loaded narrative to immediately paint anyone as racist that doesn't support it.
But of course the media loves this, they get tremendous coverage because anytime a non-white human kills a black human, they turn it into a national media controversy.
Black lives matter, all lives matter, blue lives matter—look what these movements have done. Fracture, divide, conquer. All part of the plan.