Three things about this crap:

First, the cops are as useless as those in Portland. 

Second, sooner or later- even in Canada- someone is going to respond to such an attack with effective self-defense.

Third, the asshats will scream "I'M A VICTIM OF RIGHT-WING VIOLENCE!", and the cops will arrest the poor bastard the leftist attacked.

I know the leftists love to be able to call themselves victims, but I wonder if the realize just how this crap is likely to backfire on them in the long run?  Because if people decide(with evidence) that the cops and government won't protect them...