Nuclear weapons are rather indiscriminate as to the parts of the population they tend to be used against.
Defenders of the Second Amendment tend to be individuals, and they are highly effective at sniping at the leaders of the suppression. Defenders do NOT mass in one place where they may be conveniently be wiped out at one fell swoop.
Guerrilla warfare is not at all like trench warfare or two armies meeting in a field.
The threat of nuclear warfare has always been far more in the abstract than actuality. There was never a nuclear exchange with Japan in 1945. It was all delivered one-way.
“It won’t raids in the middle of the day. It’ll be a knock at the door at 4am.”
Perhaps after a few of these early morning door knockers don’t make it home, others may reconsider their position. I don’t think we’d have problems with the military, but rather with law enforcement tacticool SWAT types. I’m old. I’ve had a good life. If they come to my door, I will shoot at least some of them. Which one is up to them.