Howdy Honest; Israel is not a signatory of the Nuclear Non-Proliferation Treaty (NPT) and, therefore, has the "right" to possess nuclear weapons. However, Iran is a signatory of the NPT and until she withdraws her signiture, she has no such "right". Nevertheless, I agree with the above article that there is no practical way of stopping Iran from acquiring nukes if she wants them--rights or no rights. It isn't the prospect of a Persian bomb that worries the world so much as concern over who is going to be in charge of the trigger. President Ahmadinejad (backed up by the Ayatollah Khomenei and the rest of the Guardian Council) honestly believes that Allah Himself has given him the job of destroying Israel in order the hasten the coming of the Mahdi (the 12th Imam). It's not exactly the type of goverenment that one would expect to be rational enough for nuclear deterrence to work. Regime change in Iran looks like the only viable option, but the chances are next to nil.
EU's Mogherini in Tehran to talk nuclear deal, regional issues (Reuters)
from the article: Ahmadinejad awaits a response