[Causality1]

Riots are also non-specific. The violence directed toward the "enemy" of the riot is at best a large fraction of the riot's violence. The rest is directed simply at its surroundings. The stores big and small, nearby homes, anyone who happens to be walking by and fitting the wrong description.

You can't do that and be just. A "just riot" would be an attack directed against a specific entity and people would label it a terrorist attack or mob violence, not a riot.