Are there any Canadian Lawyers around that might be able to shed some light on how we might be able to fight this legally?

It seems now is a preferable time to push back then when things scale up to the next level and we have even less manoeuvring room. Look, I loved watching those clips in Aus where people are physically fighting with police now, but the reality is that this would easily escalate to civil war. (Not an expectation)

Or, are we in Canada, as the lawyer who I was sitting next to implied, literal vassals of the crown?