The warhead is the key as this articular discusses. The means of initiation critical mass was the most closely guarded secret since WW II.

A consolidated Sunni population ruled by those that embrace fundamental Islam is a very very bad thing.

Obama’s advisers, the Muslim Brotherhood, are fine with a limited response since their goal is a Middle East Sunni based caliphate to counter the Shea based Caliphate been formed in Iran. Iran has the current advantage and one could assume that the Brotherhood is pushing Obama .to let Iran get the Nuke they want. Which seems counter to the Sunni goals but not so as if Iran nuked Israel then the result would be the destruction of Iran and that would leave the Sunni’s in total control of the Middle East.