People who do that are ALL thugs and savages. I don't give a damn what color rioters are--if they commit felonies, as many do, they should be prosecuted aggressively. And any that are convicted should be punished as severely as the law allows. Rioting is an attack on civil society itself, and the crimes involved are especially deplorable for that reason.
Anyone who does not own a firearm should get one and learn how to hit the target with it. People who choose to act like savages should expect to get treated accordingly.