I'm a patient guy, so I'll see if I can get through to you.
Statistics don't lie. All you are presenting is anecdotal accounts, and even doing that poorly. You want to maintain the police can be incompetent and are often brutal...fine, I can agree with that. But what you are saying is that they are especially so with black people, because they are black. I have cited statistics that show that is not true...and so far you have failed dismally to put up any argument.
Black men in the U.S. make up about 6% of the total population, but are convicted of 53% of the murders. Is that all racism? Statistics for almost every other type of serious crime, aggravated assault, b&E, robbery--they are even worse with black males making up the vast majority of convictions. Is that all racism?
The problem is that too many don't want to know the truth or want to pretend not to know it. Holding onto the victimhood status is easier as it allows the pretending it's all someone else's fault. I know racism does exist, but not to such a degree that it comes even close to explaining these stats. Black people commit more crime and so they come into contact with police more often. Simple as that.
Social media is a mindless machine that duplicates the virus of the moment. I've already explained that systemic racism is bullshit.