The thought is not implausible to me that disarmament would be popularly supported in response to some convenient pretext (wot, gangs, illegals) that most Americans would be nominally behind. The sacrifice of liberties for "security" seems to, in general, be rejected by only a minority (again, I hope it is a flaw in my perception, and not reality).
I wouldn’t hold your breath. The first amendment is now used as a club to beat down any expression of religion in the public sphere, eminent domain has been redefined into something barely recognizeable, etc etc.
Surely the 2nd really means only the government can have firearms ;)