I suspect that you're right. However, I honestly don't think the high-living sheiks of Kuwait, Qatar and even Saudi Arabia particularly want to give up their yachts, mansions, cocaine and girls or boys for some scraggly-bearded nutcase in a dismal country. Remember, any world economic impact is going to impact them, as well.
This has nothing to do with ideology. The oil-rich sheiks, mullahs and even elected officials are Muslims and as such, hate us simply for being; but they want to keep the goodies flowing, and I would be surprised if they all sign off on the Iran Doomsday Project.
However, one never knows, and I think we should prepare for the worst.