Need a little correction, afaik only 9 countries officially possess nuclear weapons, US, China, Russia, France and UK are the core five where North Koria, Israel, Pak and India also achieved nukes. You will find many Arab countries and Africans align with Iran they are in hype but there is no official data regarding their nukes accivment. You know Africa is truly nuclear-weapon-free zone under the 1996 Pelindaba Treaty, so you will not hear anything about active nukes on that region. Also what I get after the war Iran's nuclear program is being closely monitored. This is why you will find low use of nukes rather most conflicts involve diplomacy and balance-of-power measures. Although negotiation and fear are not same thing but nukes lacking counties most often rely on alliances, regional influence & economic advantage.
World needs to understand few things which are not going into balance, and they are doing things with their own influence and power five superpowers have right to do anything while their own allies can also do but if someone others try to do they all came and destroy this country like they have done recently with Iran.
This is hypocrisy by them because every country have the right to self-defense because this is the best way of live freely and indecently, but they are giving name of terrorist and hitting them creating huge lack of confidence and this can be widened in coming times Israel allowed to do anything in the name of self-defense even all know how brutally they are killing innocent peoples in Palestine and just because of them how things are going in the Middle East.