There's a difference between running over a guy trying to get into your car during a spontaneous riot and barreling into a crowd at 75mph, simply because they were blocking the roadway.
Your problem, and trust me, it's not solely your problem (it's widespread) is how you don't realize how your words sound in other people's ears. This is a very, very sensitive subject. For majority of officers that carry the brunt of opposition for the actions of the few, and have to continuously have to hear how racist they are, it's distressing. It's also distressing for the majority of law-abiding, gainfully employed blacks who have to continuously hear how bad or subversive they are. When the majority, regardless whether police of black people or anybody, are continuously mislabeled there IS going to be pushback.
No where did I suggest anyone do any such thing. A person that wants to hear racial overtones will always find it.
That 'push back' probably should be lawful, or they risk becoming exactly what they proclaim to not be.