US demographics will be WAY DOWN the list of factors regarding the response to a nuclear detonation within the US.
We'll nuke anybody, anywhere, even remotely connected with such an event.
Proof or logic be damned.
The instant a nuke goes off within the United States all previous arguments and assumptions on such a conflict are moot and, in fact, counter intuitive.
We will lash out at anyone who looks at us wrong.
And rightly so.
I gather you won't be the one who decides what to do or how to do it.
I gather also that that decision will be in the hands of the then president with the consesnus of the people. There we go back to the people. The problem is that the then president won't have the consensus of the people because the vast majority of the people will be against nuking the native lands and people, they or they parents and grandparents came from.
Naturally you see no problem with more of your people invading our country. But this issue will eventually be solved in the streets of America.
No we won't. If one of the "mules" carrying such a bomb were to be a British Muslim, born in Britain, but an alien in the culture, would we nuke England? Of course not.
We would be angry, yes, of course but also confused, and ignorant of the facts for weeks at least. Meanwhile, a second attack could be threatened unless Jimmy Carter is named to negotiate. He will not be murdered as you suggest, indeed, half the nation, the blue states, and most of the rest of the world will regard him as our only hope of avoiding the vaporization of a second city.
If you think the mothers are going to sacrifice their children to demonstrate their opposition to appeasement, you simply do not understand half the population of this world.
The appeasers will gain the upper hand and you can kiss our democracy goodbye. Or, we educate people now as Tom Tancredo was trying to do in his fumbling way, and establish a policy NOW while there is at least a government in place and a way to establish a national consensus.
I say we HAVE to nuke somebody if we get nuked. At that point the stakes are so high we have to demonstrate the backbone to Zot(!) or else we appear so weak the rest of the jackals will come in to pick our carcass clean. We can be sorry later.