If anything the US should build up its antimissile shield and increase the number of nuclear weapons available for counter attack. Mutually assured destruction is the only policy that will make the world peaceful.
There was a time that was true.
Unfortunately, the Muslim “Twelvers” seem to believe that if they can institute global chaos, (and what could be more chaotic than global thermonuclear war), they can summon-up the guy taking a nap at the bottom of some well somewhere, and he will convert the entire world to Islam.