BS. Blacks are asking not to be followed in stores. Not to be harassed for minor offenses (ie license plate light out) Not to be subjected to a search at every traffic stop. Not to have cops have itchy trigger fingers around them.
I will give you an example. Buddy of mine who is black and lives in the same neighborhood as I do got pulled over by a cop who had set up a speed trap. I have no reason to believe race played a factor in the stop, but he received a ticket for 51 in a 40. He was cooperative and the exchange was friendly. He drives a BMW 3 Series.
Coincidentally, I was pulled over by the same cop on the same day at the same spot in the road for 53 in 40. Cop ran my license and came back, addressed me by name and gave me a warning. Told me to slow down on that stretch of road because he was going to be present and ticketing for the next few weeks. He shook my hand and told me to have a good day. Whole stop lasted less than 3 minutes. I drive a G35.
The stories compare favorably to each other with only two real differences. He's black and I'm white. He got the ticket and I got the warning. Maybe race didn't play any sort of factor at all, but you can understand why black people would assume that it did.