Surely you jest? You're comparing possible escalated military action to rounding up millions of..."jooz" as you're so fond of calling them?
I mean....wtf?
You really can't be that dense?
Read the scenario, and accept all of its realities.
US armed forces delivering nuclear payloads to enemy sites designated by the CinC.
The US loses.
The victor holding Nuremberg style trials over US servicemen, from sergeants to generals, involved in everything the victor perceives as a war crime. Mosques were hit by nukes, it was an affront to Allah, proletariat strike on the bourgeoisie, take your pick.
Yes, it's highly possible that if the US loses a war with some power later on in the cycle of history, that that power will have a vastly different moral compass.
The Germans felt that following orders was a suitable defense for their actions. History doesn't show that.
And keep in mind, that massive global-scale wars have a tendency to rewrite the rules after the fact.
(Anyways, I just spent two hours rallying in front of Flake and McCain's offices in PHX, protesting any use of force in Syria. Not that it'll do any good.

)