Put a tick on the wall Lomu, you have said something sensible.
Going to war with one nuclear weapon is like going to war with one magazine for your rifle.
Israel's nuclear policy makes sense in the same way India's and Pakistan's do: Their deterrence is justified as defence against another known enemy with a similar scarcity of nukes. But none would pretend they are a MAD defence against a superpower.
But [bad grammar twice ] Neither Russia nor China can trust in MAD, Russia because they have no idea how many, or which, of their nukes will work after decades of neglect and China does not have the delivery systems that the US has spent trillions perfecting: Their bombers and boomers.
Mad mullas and Rocket Man Kim excepted, nukes are unlikely. Our best defence is the US. Prey we can survive Trump.