But the more important factor is that in most homicides the victim and the perpetrator know one another. On that basis minorities, and particularly middle-class and up members of minority groups, have good reason to be more concerned about abuse and/or murder at the hands of authorities as a more important consideration than truly random violence.
My mistake - this does not change the nature of my argument at all. That's still a massive difference in risk.
Why do you think it makes sense to ignore the majority of homicides (which don't fit a popular political narrative)? That's like saying "Most car crashes happen near home, so on that basis people have good reason to be more concerned about plane crashes."
If you are middle class and non-white your odds of being hassled by the police are quite high and probably validated by experience. The odds of such an experience escalating into violence or death may be empirically small but each and every instance of interaction with authorities is an instance of greatly increased risk and a risk that is in large part out of your control. This is something worth being concerned about and that concern has an impact on your day-to-day behaviour and well-being.
Being more concerned about police violence than random violence makes perfect sense to me. I suspect that if you dig into it that concern is also empirically more rational.