You can see the beginnings of this already in Brooklyn, where Jews planned to band together with shotguns and patrol their neighborhoods. They were immediately threatened by the City and the Chief of Police, as if they were the real threat.
Powerful government doesn't like armed usurpers taking over their monopolies of power. They will fight harder than any religious jihad. To them, it is a violation of their religion!
When the killing gets nasty, government will crack down hard against those trying to protect themselves against the threat. Decades of trashing the 2nd Amendment has assured that outcome.