That still won't prevent the inevitable from happening. As long as NK is run by somebody who is completly insane, we are threatened. You look at history, our nuclear-armed adversaries have always had a bit of self-preservation in them. Outside of Kruschev, you didn't have to worry about the other guy pushing the button, and even he was controlled by others. NK has an insane leader, and his people are starving and probably believe whatever nutty ideas fly out of his mouth.
Like I told a friend recently, when you look at WWII Nazi Germany and what they did as far as missiles/rockets with warheads, and you look at how far advanced North Korea is over them, it's not hard to imagine a few of our states getting nuked.
The Japanese themselves have started talking about this. That's a problem for the Chinese, who undoubtably don't care to see a powerful Japan.
Kim is going to isolate himself from everybody.