Allowing Iran to maintain its enrichment program is the only sustainable solution as it allows Iranian regime to save face
A final diplomatic settlement that provides sufficient transparency and assurances against weaponization efforts while respecting Iranian rights to a civilian nuclear program under the Nuclear Non-Proliferation Treaty (NPT) will be more difficult to achieve. But, unlike military action, it is the only sustainable solution. The Supreme Leader’s repeated insistence that Iran’s program is solely for peaceful civilian purposes, as well as his statements that the acquisition or use of nuclear weapons would be a “grave sin” against Islam, may or may not reflect his true beliefs. But they provide a public discourse that would allow the regime to climb down from the current nuclear crisis without losing face, so long as there are clear benefits to any final agreement and Iran’s rights under the NPT are respected.
Iran has repeatedly held that they have an inviolable right to enrich uranium and will not accept a complete restriction on their ability to do so. By restricting the number of centrifuges they have, the current nuclear deal is the best available compromise that allows Iranian leaders to save face while still slowing down their path to a nuclear weapon.