I remember one of the first times I was pulled over. I was driving my dad's car, which was a nicer but not terribly expensive, luxury model. The cop literally had his gun out in a battle pose as his partner approached my window. I thought that was normal until someone told me otherwise. Apparently, the cop thought the car was stolen and was expecting a gunfight due to how I looked (young dark guy in a bmw driving the way most teenagers drive).
I'm decently well off now and don't often deal with this stuff much or just don't notice it anymore, but growing up I was certainly treated a certain way my white friends were not. I don't blame them if they don't understand this automatically. They never had those experiences and its understandable. But it is annoying to be auto-downvoted like I'm making all of this up or have some big agenda. I rarely talk about this stuff to be honest, mostly because of reactions like this.