2001-2008: Dissent is the highest form of patriotism.
2009-2016: Dissent is the highest form of racism.
2017-? (Probably): Dissent is the highest form of misogyny.
The posts in this thread have pretty much covered the topic. Yes, having nukes is a deterrent... which is why every country that doesn't have nukes wants them or will want them as soon as they feel threatened.
Eventually, all of the countries who want them will have them. Genie is out of the bottle, and we're not going to get the top back on... ever. When that happens, rogue nations (like Iran, NK and others) will not be shooting them from their own soil. They'll be selling them to others or giving them to their own lackeys to be set off at remote locations... like Tel Aviv or NYC.
Like Risky Thicket, I don't believe it's a question of "if", it's a question of "when". If Iran's nuclear program is destroyed this year, I don't think WWIII will break out, and I do think it will be at least another decade before Iran comes this close again. But when Iran has a nuke, I believe it will definitely use the nuke in a manner that they can deny responsibility. That is when WWIII will break out.
I hope I'm long gone by then. It's my kids and grandkids that I truly worry about, and what kind of world awaits them.
Israel is NOT alone in the Mideast nuclear race, they are however the only non-arabic entity.
I think that fact the world survived the Cold war is enough evidence for me