I agree, too little; too late.
I think that anyone arrested and convicted for participation in a riot, should be excluded from receiving any government benefits for life. That includes, welfare, Social Security, Medicare, etc. That might get their attention. That is in addition to any penalty for the rioting itself.
My very liberal brother was shocked when I declined to visit him where he lives in Portland. I told him I had resolved to NEVER set foot in Portland again.
How did your brother become one of the enemy.