Yes absolutely they would and insurgencies are not the same thing as two nations fighting each other. America has twice as many gun owners as there are people in Afghanistan, a large chunk of them have combat experience.
replyAnd nearly every soldier playing government side would very likely have relatives on the other side. Most likely great demotivator
replyWhat makes you think the us army would unite against them? Sure a few nut militials would be suppressed, but if gun owners in mass are raising up that means a large controversy that the military will be aware of. The us military is not full of 'yes men' who will follow orders that blindly on home turf, a lot of them will follow.
replyi doubt we will see this in my lifetime