You have some valid points, but please refrain from a sense of satisfaction over the ambush killing of police officers. It's not helping you.
Yes, there has been a long history of racial animosity in this country that has negatively affected blacks. And there are still remnants of that today, and there are also just some aspects inherent of a minority (a la beauty standards). But perhaps as white people come to a better understanding of the experience of blacks and make a better effort to erase injustice, blacks could make an effort to remove the ingrained feeling of racial targeting of persecution? I'm not saying it doesn't ever happen, but I find it hard to believe that people honestly look at you like a criminal when entering an expensive store dressed nicely. I know a whole lot of black people a lot more wealthy than I am, and I imagine most people are in the same spot.
I think everyone would be much better off if everyone extended others the benefit of the doubt more often. Regardless of how we got here, we need to fix it. I didn't enslave anyone. But I understand the feelings that come with being a minority living among a people that at one point did enslave them. Rather than tossing blame around, let's all try to honestly fix the problems where they still appear.