Only country crazy enough to use nukes is Israel but they know if they use nukes, Pakistan and maybe China and NK is going to end up gifting nukes to all the major powers in middle east overtime to even the scales.
No one is stupid enough to use nukes especially when it allows Pakistan to offset numerical advantage of india with nukes, or NK using nukes against Japanese military rise/fascism. Whose to stop Russia from using its massive arsenal of nukes or any other country for that matter to just start dropping nukes e.g. France in Sahel region to regain power.