I tell you what, I have heard some folks I know who nobody would think of as "gun nuts" at all just blow up (in the pro-gun sense) when the topic of gun bans has come up. I love it. It's not a country wide sample, I know.
I think the founders were right on with the 2A. Sadly, and hopefully not, some of us may see why it was put in there to begin with.
As far as "the people vs. the military" or "the people vs. law enforcement"....I really do struggle with this a bit. But I feel in the end (maybe after a while of torturous martial law, atrocities by the current Admin., etc.) that the military and local LE would start saying "HELL NO!" and there would be a serious backlash.
All of the polls indicate a strong "right leaning" military for sure. I can't see our guys doing mass political killings and such without an outright rebellion first, but maybe I'm naive and just a product of the Red Dawn generation.