The thing is, I doubt that containment of Iran would work long-term...at least not under the framework of a nuclear-capable Iran.

They have aspirations of becoming a major power in the region...for the better or worse of their neighbors.

And, even if they don't actually possess nuclear weapons, just the thought that they might possess nuclear weapons gives rise to much unease in the region since they have had their hands on much instability in the region.

And Israel and many Arab countries in the region will very likely take steps whereby a new cold war takes place in the future.

And I doubt that any Persian Gulf cold war would remain cold.