The good thing with a second amendment, from the point of view of an authoritarian regime, is that if you arm loyalist militia to gun down protestors, you have plausible deniability. Look at Ukraine. A lot of weapons in the population, makes it easier for Russia to support a side without direct involvement.
Ukraine doesn't have 2A though. Most of the "weapons in the population" in the hot phase of the conflict there came directly from the military bases where the separatists used to serve. People simply switched allegiances. Some willingly, some not so willingly.
Wrong. Soldiers and weapons came from Russia.
What can be asserted without evidence can also be dismissed without evidence.