"then the complete blame will fall to the Euros and the Russians."
A little late for the blame game. If it goes Nuclear, it goes Nuclear. End of story. New beginning of History.
One thing of note. Nuclear is not so Nuclear anymore.
There is a thing called EMP. It does not kill at 1st, nor does it destroy at 1st, but it wipes our all electric generating capability within view from the point of explosion. It is exploded in the Atmosphere and the size of the detonation determines how high. Over Teheran, it will cause all electrial connections to fry, all toilets to stop, all refrigerators to stop.
In a matter of days, hospitals will be without backup power of any kind. Old and young will die. Then disease becomes rampant with the rotting bodies and food. Communities will die and people will riot killing each other and feeding on the dead.
Much slower than being incinerated, but the results are just as sure.
Oh come on! How about the days before electricity.