I don't see that either of you are right. What I've read is that we don't have good statistics on deaths resulting from policing. [[see ever-accurate
wikipedia)
BLM is no doubt correct that there is police racism, brutality and deaths of blacks as a result. But I also suspect that this is a receding problem. IMO, you both are right.
We should be fighting bad policing -- but also recognizing that general violence in the black community is a far bigger problem.
So why is the focus so much on police brutality when that's a smaller problem?
1) Blacks say they feel victimized in non-trivial numbers.
2) Politicians feed on #1
3) Video technology now shows us things we never saw before
4) We don't see videos of the 'every 2 hours' shootings in Chicago' where a massive number of violent and senseless deaths just wash past us each day.
Perception is reality [[McLuhan?). So we think our biggest problem is the police. This is delusional. Its a problem -- but the real problem is that the massive violence occurring hourly is hidden from view. If we could watch criminals murdering innocent store clerks, children on the street -- see drug lords murdering family members of kids who try to go straight -- victims of domestic violence -- the perception would be quite different.
Police brutality is most certainly a major problem. Its worth fighting. Its worth protesting. But its a misguided fight against a police force that IMO is so much better than they have been. Its yesterday's fight. Look at the praise heaped on the Dallas PD for their recent reforms.
Our perception is accurate, but very incomplete.