The black lives matter movement is not built on individual mistreating other individuals.
It is rather on racist policeforces, that violate Black people physically with no legitimation. And when it comes to court it is very hard with one voice to defend against two police voices.
As I understand the protesters only want to change this. That there is better police education, on what action of a citizen legitimates what reaction of the police. Since there is many cases, where Policemen are not reacting. But acting. And this can not be the will of a freedom aiming country.