Which is an argument consistent with the moral position regarding the initiation of force.
Except personal nukes. Personal nukes are impracticable.
The real problem with allowing each man to possess his own personal nuke is that he could just about guarantee that he would never be brought to justice after having targeted his oh-so-tolerant libertarian neighbors. Some straight-thinking man bent on self-preservation would take the law into his own hands and preemptively and permanently adjust the nuke-bearer's attitude before the device could be ever be triggered. That may be a most unlibertarian action to take, but it is what can be expected to happen where libertarian hubris and stupidity meets human reality.