If they are violent, they must be charged in a court of law. If they are wearing a mask, that is against the law.
Time to purchase a burka
The blackshirt fascists in Charlottesville immediately descended on the car in that accident with baseball bats and other weapons. Even the press was unwilling to declare the initial impact anything more than a car wreck (at least for a couple of hours).
Within SECONDS the crowd had reached their verdict that he was guilty.
This is not to defend the driver, just pointing out that there was violence from several sides that day. It is still unknown if they were hitting his car when he initially drove past the people with the bats (they attacked him from the rear).
I’ll add to it that the billyclub wielding blackshirts (and blackmasks) were armed for conflict. They may not have been anticipating a driver hellbent on hitting protesters but they were anticipating escalating violence and attacking someone that day.