But that bring stakes high enough so in absolutely most cases it doesnt worth to directly attack said country. Take, for example, Iran or NK.But you need thousands upon thousands of warheads to achieve MAD to be destructive and reliable enough. Less than a few hundred is limited deterrence. Limited deterrence ultimately doesn't deter MAD capable powers as the power with limited deterrence is deterred by total annihilation as opposed to holding a few targets at risk.
I dont think IRANIAN oil is important enough for USA to actually risk New-York or Los-Angeles. Iranian have all right to do anything with they oil, same as USA have all rights to do anything with USA oil or USA microchips - which is current world are even more important than oil.
I also dont think USA hate toward word "communism" (because, lets face it, NK is not communistic by any mean) are high enough to risk Detroit or Tokyo. And if USA try it - they will get a nice diplomatic storm from Japan or SK.