The police an unenviable task

The image of the police in this country has received a bad press, particularly after the shooting three years ago of Mark Duggan. It's amazing having lived in countries where the police are really heavy handed that our police in this country are so derided. To counter the derision coming from certain sectors and to attempt to "get onside" they have allowed the television cameras in to depicted themselves, where possible, as leaving the policing of street gatherings, carnivals etc, in predominantly black areas of London to the residents themselves. This was largely due to a demand of the leaders of the community who see the police as racist and at odds with their society.
The question arises what is a racist, and how do you define racist.
Given that the definition of racist is "a person who believes that a particular race is superior to another", then the act of defining a race and demanding separation from the other, which is what the local community demanded and the police agreed to cooperate, is this the act of a "racist community"? Have the black people in our society become racist ? If a section of society overtly displays its power and insists that the colour of the skin is the determining factor then we would normally say "that's racist".
Obviously discrimination, unemployment and the banding together of people who recognise their ethnicity and believe their economic position in society at large is due to the colour of their skin will draw from this dark well and find fault with all and everything people who don't fit their stereotypic profile represent.
It's not going to get any better as the disenfranchised grow in numbers and see their strength increase in these growing numbers. Society which doesn't recognise its constituting parts or feel proper affinity for others in that society is bound to collapse under the weight of its own distrust, irrespective of what the police force does !!