I really don't see how a small country having nukes is more dangerous than a large one.
Nukes are orders of magnitude more powerful than anything else.
Iran with high explosives = meh
Iran with nukes = Call of Duty Modern Warfare Scenario
There are two types of nukes, tactical and strategic.
A tactical nuke is for use by a general (or solider at least). Wipes out Strife and his tank company. 60 lives or so.
A strategic nuke is for use by a politician. Wipes out Fargo, West Fargo, Moorhead, and irradiates the surrounding area. Bad things.
Normally, you can trust a country not to use nukes, because of MAD (mutual assured destruction). You nuke us, and we'll turn your entire fucking mud ball of a country in a crater. However, the more countries that get nukes, the better the chance that some idiot will use them. I don't even know how big of a nuclear war it'd take for us to get nuclear winter (
although it might cancel out global warming ).
For secondary concerns, we've got small countries being generally more unstable. Iran + nukes + civil war = rouge Rep guard division with a warhead?
Also the fact that no nuclear country has ever been attacked in a conventional war. What happens when the Saudis are pushing on Tehran? Will the Iranians respond with a nuke?
Finally, we've got the fact that it's much easier to steal from small countries. It'd be a fluke of an ungodly level to get a warhead out from the US. Collapsed USSR? Much easier. Iran? We don't know. Iran in the middle of a massive civil war? Fuck.
Honestly, nukes scare the crap out of me. The more nuclear parties, the worse the instability gets. Note however, that it'd be a disaster if the entire world were to disarm their arsenals.
Mind you, Palazzo's thought does have some value. I'd rather a small stable country get nukes than a big unstable one (A nuclear Switzerland would be kinda cool, no?) However, more nuclear countries = bad.
Not to much thought, that's what I think about on a regular basis. That and zombie preparedness. And knives.