Bush's idea of diplomacy is to say, "Do what we tell you to do and then we'll agree to talk about it!" To which Iran and North Korea respond, "If we have to do what you say before you'll talk with us about it, then what's the point of talking about it? Go screw yourself!"
To that sort of "negotiation," that sounds like a reasonable response to me.
Diplomacy is a bit more sophisticated than that, and it's the major reason that there have not been many more wars than there have been.