Besides the spurious study, the fact that you raise spurious crime rates (worth calling for a citation on, as well) tells me that you don't get it.

Cops are supposed to protect citizens.  The expectation in the African-American community, based on their lived experience, is that cops don't protect them.  Instead, they target them disproportionately, and escalate the use of force without justification, and without any accountability.  And it really doesn't matter what ethnic background the cop in question has -- he's (and it's overwhelmingly been male cops) is a cop.

Now, in a democracy, shouldn't citizens feel that the cops serve them, rather than the other way around?  And the fact that yes, cops shoot unarmed white men too, doesn't in any way make it all better.