"Starving one farmer at a time" is evil but rational (and, it can be argued, is also done in some West-friendly countries). However, I very seriously doubt Kim Jong-Un would be able to "go out in a blaze of glory" in an apocalyptic scenario. Most likely, North Korea as a whole would act rationally and he would be taken out by a military junta before he destroys everything. No matter how evil he seems, he must have a rational entourage. Even Hitler had one. Stuff simply has to get done in NK; even if the only plan is "blackmail other countries to give us money", do you not see that's a perfectly rational plan?

As for Iran, I understood you were talking about their government. Nothing I've heard of them so far strikes me as irrational -- just hostile to some Western powers.

We must stop confusing "hostile" with "irrational", that's all I'm saying.