Except the will only ever use them as a last resort and have a democracy so MAD actually works. can you say the same about Kim Jon Il or the leader of Iran?
Yes, they may be a bit "mad" but they are not that mad (especially Iran). It's saber rattling, that's all.
The biggest worry for the likes of America is that if they ever decide to invade either they can't if they have nuclear weapons because, like the US and pretty much every other nuclear armed nation, NK and Iran would use them as a last resort...
No doubt Isreal won't release it's numbers of nuclear, chemical and biological weapons...
Haven't they got to reduce that number to around 2,500 anyway? So in essence the release of that number means absolutely nothing.
