I certainly believe the bad cops are not representative of most. I also believe that black people (especially young black men) are pulled over more often, questioned more often, and searched more often. Thus the chances of encountering a bad one go up. My white son is assumed to be a harmless teenager by most people he encounters. A black kid his age is often assumed to be up to no good. A lifetime of assumptions like that have their effect on people.
Stop discounting their experiences, for one. Don't make pronouncements about how people of color should feel or act because I haven't experienced what they have experienced. Don't make assumptions about people. I think most of us if we are honest with ourselves have done this at one time or another. Stop looking at every single one of their grievances as "political correctness" and recognize the legitimacy of some of them.
Stop denying racism has any effect on people and their lives. If more people did this I think things would get better. Not perfect, but better. At least people would feel heard. Every time a person of color hears someone say their problems are not real or not significant that contributes to their anger and pain. We aren't going to solve these problem by lecturing people that their experiences are false or don't matter.
I won't contribute to that any more by the things I say or write on social media. Will it make much of a difference? Probably not. Maybe if a lot of people try to examine themselves and change their mindset, it will. In any case, it's about self-improvement. I have no delusions that I personally can fix racism.