if you have a nuclear weapon and you use it do you think it will help you win in a limited engagement between two Nations that are close by each other?

the calculus everybody has made for 70 years that no it won't help it'll make it worse and that is why they have not been used

a crazy person could do it

North Korea seems crazy

Iran is not crazy and nor is Russia and neither is Israel. Pakistan and India are definitely not crazy

Russia's so incompetent they probably lost the keys