Thus, the paradox: Many supporters of a diplomatic deal don’t believe the danger of a "nuclear Iran" is all that momentous, while opponents of the current deal think Iran’s nuclear program poses a grave and imminent threat. One would think the former would be more relaxed about recent progress, while the latter would be more enthusiastic. But that isn’t the case: Those with a moderate view of the nuclear danger are much happier with the deal than those who (logically) ought to be more interested in anything that constrains what Iran is able to do.