I understand this is a subjective point of view as it is in response to police violence.
If things are as bad as the media suggests, that racist cops are targeting and killing black men and getting away with it then yes they system needs to be over thrown and the argument to use violence is easy to make.
But many don't believe things are that bad. I don't know as I don't live in these neighborhoods. But I think it's valuable to examine why people disagree on the issue.