It is a check on the internal excesses of the Shji'ite Islamists only, not a check on their warlike posture toward Israel and the rest of the world generally. As long as the fanatics stop short of internal repression, this card will not be played.
I'm imagining that a revolution would:
A) seek world support for its movement and use the nuke program as an enticement to garner that support.
B) simply shy away from antagonizing anyone--even jooooz--while it is still in its infancy and had yet to consolidate its authority within the country.
C) not share the same ambitions as its predeccessor because they aren't a bunch of batshit crazy armageddonists
Just dreams though as Obama wastes no opportunity to waste an opportunity. I think he'd rather slap away the open hand of the green revolution just so he can have a chance to try and prove his pet theories about negotiating with the jihadists.