Disarmament and non-proliferation is an excuse to meddle with the many not-so-small-as-the-big-boys-would-like nations.

Give a dictator "the bomb", and it becomes clear that he is the boogey-man holding his nation hostage. No excuse to consolidate power where it can all be destroyed at-once by your own side, and pretending anyone wants to invade your killswitch'ed capital becomes a much-thinner facade.

That's precisely why the west won't give its favorite dictators the bomb, and why those dictators know-better than to seek it.

Am I saying North Korea and Iran aren't fascist-dictatorships? No, but keeping them from having the bomb isn't really a good excuse to *help those governments isolate, dominate, and radicalize their people by punishing them economically, restricting their peoples' freedom of movement, and bombing them whenever too many of their best-and-brightest get together in one place.

It's no better an excuse than Oil, nor "drugs" or communism.