Anyone driving a vehicle where one of these mobs ate and stops is a fool and will soon be a dead one.
But if you drive through you get the Charlottesville railroading. Best bet is to do a U-turn and go back the way you came. If any governor had an ounce of back-bone, they would simply announce that due to recent events (mobs attacking and shooting at vehicles (note this is not the first time they have shot drivers)), anyone blocking the road is considered an a priori threat so drivers are not obligated to stop and driver actions will be considered self-defense.