Crushing them is boxing in the agitator's vehicle, puncturing all 4 tires, smashing in all the windows, opening all doors, pulling them out by their hair, pile driving them to the ground, cuffing them, call the paddy wagon, and tell them to have a nice day. Service with a smile.
They'll remember that day as they pay to get their car out of impoundment, to repair their vehicles, to pay for lawyers, to pay court fines, and to possibly do jail time or to put on probation - which makes it much easier to lock em' at the next 'protest'. I'd say loose work pay, but I suspect that many of them are unemployed and unemployable.
Liberal judges will let the 'peaceful protestors' walk out of court, so ICE needs to rain down pain and punishment down upon immediately, on site.
Water cannons with dye that permanent stain clothes. Non-lethal air rifle pellets that smell like skunk, and contain aerosolized ipecac to make them barf. Possibly deploy helicopters to pellet the crowed with rotor wash. The best way to disperse a crowd is to make them physically uncomfortable as possible. Convince their lizard brains to flee.
Oh, by the way, if they are prosecuted and convicted, add them to the Federal no-fly list. Let them take the train or the bus to Kommisar Bernie's May Day celebration on one of Comrade Sanders' multiple private islands.
RINO:
"It's bad optics..."
Optics, schmocktics...
They're antifa communists.
CRUSH THEM.