The Iranians are neither stupid nor crazy. It is a comfort to think that they might be, but they aren't.
Because if the Iranians are stupid or crazy, then we can dismiss what they are saying or why they are saying it. We then do not need to look at our own hostage-taking actions, nor do we need to dance our elaborate dance of self-justification.
What those labels also give us are the excuse to refrain from thinking. There's no analysis required if someone's CRAZY! Hurray! I was worried for a minute there, but now comfortably sit back in my preconceived notions. Ahhhh.