I hear you. Perhaps I'm just being too pessimistic, but I think we're far short of the critical mass needed. For now, I've got to bet on the panzers over the peasants (so to speak).
But I hope I'm wrong. A good sign would be if some of those panzer commanders refused to deploy.
If by "critical mass", you mean the requisite numbers of angry and motivated citizens required to make Fedzilla surrender to the people, don't worry. The "mass" is there. It simply needs the right catalyst to cause it to go "critical".
The feds just came *this* close to bringing it to ignition - which is one of the main reasons they backed off. Lighting a prairie fire of citizen revolt is the last thing they want to do at this time. There's no way they could stop it, once sparked, and they know full well that it would result in the dismantlement of the last 100 years of Progressive Change™ in America.