You gotta realize, cops have been putting knee on neck or chest to restrain a suspect for forever and a day in this country. Usually everything works out fine, but every now and then someone dies of this (usually when a lot of drugs are involved). Up till Floyd the people who died this way were white, and the cop always got away with it; but the minute it happened to a black man, BLM got involved everybody noticed, protested and the cops got convicted. Had he been white it likely would have been business as usual with the cops getting away with it like with the deaths of Tony Tempa ,Edward Bronstien, or Timothy Coffman
I'm not familiar with the cases you're referring to. I'm not doubting that there are plenty of whites who have been mistreated and even murdered by cops, although whether they get away it can be due to a variety of circumstances.
In my own city, I've known people who had family members, friends, employers, etc., who may have had some level of pull with the local government. As one example, I knew a co-worker whose father was a high-ranking official with the Border Patrol, and he related a story about how he was pulled over by a motorcycle cop who had some kind of shaky reason for stopping him and seemed like he was just out to mess with someone. My co-worker was a young guy, who would dress somewhat shabbily with a bit of arrogant demeanor that would likely trigger the average cop. However, once the cop ran his ID check and found out who his father was, he turned white and let him go, but still somewhat upset and saying "if your father wasn't who he was, you'd be in big trouble right now."
So, if you're in your own town and you're familiar with the local hierarchy and how things work, then dealing with cops can go much more smoothly. It's when I'm out of state that I worry more about cops.