I think you've got your view backwards in the sense that every protest you've experienced up until now has been small enough to not be majorly disruptive because that crowd of "I will not accept this" hardliners was small enough where it would literally be folly to belabor the point further. That does not place an effective ceiling on legitimate vs. illegitimate protest, rather it puts a floor on the quality of your Statespeople at doing their jobs in a way that gets enough people not feeling marginalized.
That is clearly not the case here. Each of these protestors is someone feeling they are not being represented. They have the right to hold everything the bugger on up until some level of reasonability comes around. That is the fundamental dimension and action of politics. Just because it's been a good many years since the consent of the governed was pulled back doesn't mean it can't still be.
The number of people pounding the drum of "well these miscreants better watch out, the will of Canada is going to steamroll them!" or "It is the will of Canada that these people be pushed out of the limelight and ignored, so cut off their logistics, make it easier to enact financial violence (fines), and imprison them!" instead of "Well, shit, maybe we did go overboard a bit, didn't we?" disturbs me.
At the end of the day, those people are Canadians too. The mark of a country is how they treat their conscientious objectors.
And yes... I say that with a straight face accepting where the U.S. is on that scale recently. I just hope Canada doesn't follow our lead down the road to hell.