At some point, they'll have too.”
It’s just like dealing with a defiant child (which is really what these rioters are). At some point you have only three options: 1) Just stand there forever, telling the child to do something, while he stubbornly refuses 2) Give up and let the child win, or 3) Spank the snot out of the little brat until he learns to behave.
It’s time to deploy option 3.