I don't get why the militia types think they could take on the US military and win.
And yes, the military would fire on US citizens. They swear an oath to do exactly that.
I hear that worked out great in Afghanistan.
The idea that asymmetries of power render a group militarily helpless is little better than a joke. The lessons of Vietnam, Iraq, and Afghanistan ought to be enough to put to rest the idea that a smaller, less well-armed force cannot put up a lasting resistance to a mighty military.
In the end, it is important to realize that the Second Amendment is just as relevant today as it ever was. Human nature has hardly changed in 200 years, and the rights we possess are no less inalienable or self-evident. Anyone trying to erode our constitutionally-enshrined rights should be immediately held suspect. If we do not protect our own rights, who will?