I'd respectfully disagree on this issue. I think it's possible to be worried about police abuse of force from the context of being a person who is a mere citizen and thus has a lot less rights than the police. No ethnic group has a truly zero chance of dying at the police's hand. Do white people have it better? Yes absolutely. But it's not as though the police only use excessive force against black people.
I think you're missing the possibility that there are conservatives who want police use of force reform too but want to do so in a color/ethnicity agnostic way. The idea that non-black people say 'All lives matter' only to prevent change is probably not correct. And the reactions like the one I quoted above only serve to divide folks rather than find common ground. It's pretty tragic.