His question was far more limited in scope than your answer was. You claimed that there are years and years (including currently) of systemic persecution.
"Outlook" is often very different from reality. I have no doubt that the children and grandchildren of folks who participated in the civil rights movement received a different lesson on the police than I got as a kid. Whether or not that was appropriate is another matter entirely, and you say it is. I know you have no issue with conspiracy theories, but think of how far up it would have to go in order for there to be a current, systemic attempt at "keeping minorities in check." The laws of the 1950s and 60s were what they were. It was systemic then. The laws of today are what they are. It's a high bar to jump over to get to "systemic" today.
I know a lot of that sounds like petty semantics, but I think it's incredibly important to define what we're talking about. Saying that "racism" is the issue driving police misconduct is, I think, highly unproductive and probably even counterproductive.