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.
The feds will target the Oathkeepers I am sure.Probably will send covert squads of loyal goose steppers to join up and then to find ways to destroy them internally.
I see right now the situation that the Feds do have a real problem, they cannot get enough domestic troops, not when each one of them is being back tracked and put up on public forums, where they live, where they shop etc.
UN troops? could happen. Worth keeping an ear to the ground, the Feds are a petulant rich spoiled genius ideological maniacal brat that will NOT learn a lesson, will NOT surrender, it can have its bruises, its broken nose but will come back later with a street gang and more firepower.
They want to marginalize, they wish to create turmoil in the ranks, to divide.
Bunkerville showed the opposite, thousands came without being given any marching orders, they just did what they believed in, a strong beliefs are a more potent weapon than a powerful gun.