He or she may not feel like exposing their identity but what they say is not that far off. Most of the violence is not by the local people who will be directly impacted by the violence in the neighborhoods. It's by people who found a nice excuse to vent whatever frustration they have violently and anonymously. These acts don't further justice -the same way mistreating arrestees does not further justice. They coopt the frustration of the community and corrupt it and moreover set the community back in terms of forward development.

I think the problem is more your interpretation with what they are saying than what the words they said. Also, who are the people above the law, the rioters, the bad police, its not clear, but we know both contribute to destruction.