This was discussed in other threads. I came to the conclusion that police feel like since racial profiling does work since you do find more illegal stuff in black cars than white cars, that gives them the right to do so despite the immense indignation this is causing to innocent people.
But if you are asking if police are more “brutal” to innocent people, you will need to go make studies about this. There isnt any national database on use of force incidents. There are mixed results from the data that we have now.