Where's the evidence that Iran truly intends to change its behavior?

If Iran still has revolutionary intent, then no amount of treaty subtlety will enforce this deal. Iran will begin subtly subverting any agreement. It will continue to work on its advanced nuclear technology even during the agreement. It will inevitably use nuclear weaponry, or even the threat of eventual nuclear weaponry, to advance its apocalyptic interests. Every other regional power will prepare for the worst, and we’ll get a pseudo-nuclear-arms race in a region of disintegrating nation-states.

If President Obama is right and Iran is on the verge of change, the deal is a home run. But we have a terrible record of predicting trends in the Middle East. Republican and Democratic administrations have continually anticipated turning points in the Middle East: Republicans after interventions, Democrats after negotiations. But the dawns never come.

At some point, there has to be a scintilla of evidence that Iran wants to change. Khamenei’s speech offers none. Negotiating an arms treaty with Brezhnev and Gorbachev was one thing. But with this guy? Good luck with that.