Specifically unarmed people killed by the state are very disproportionately black, though. Even given higher crime and deprivation rates in black communities, the relationship between those people and the police has not been good for a very long time, and heavy handed "externalised" policing styles can't help.
And most of the BLM demands are very reasonable and have worked well where enacted. If you're sending cops out with live rounds and the ability to kill, you should also be sending them out with body cameras, proper training, and clear guidelines on when they are criminally responsible, all of which have historically rarely happened. Whatever you may think of the stats on race, BLM has done a lot to push states and cops to actually get their asses in gear and no longer assume they are above the law when it comes to killing people. The FBI didn't even keep comprehensive stats on police killings until all this happened; now there's finally going to be a proper national database from 2017, largely thanks to the pressure from protests like this.