the reason Iran acts as it does, has to do with their particular religious views. the are waiting for the 12th Imam. that's their messiah. in order for the 12th to appear, there must be chaos in the world.
this generation of 12ers in Iran believe that the 12th is here. only conditions have kept him for appearing to all, although rumor has it he has appeared to some, like achminutjob. nutjob believes it is his job to usher in the imam and to do that, he needs to create the chaos.
because most Americans don't know/understand what they believe, the actions of Iran seem crazy. if you look at it from their religious point of view, those actions make perfect sense. it's why i believe they would not hesitate to use any weapon they got their hands on, including nukes. that's the perfect chaos weapon even if it's small.
i have some good stuff if you are interested. i'll dig it out after the gym. one really good PDF was given to me by a Muslim who doesn't agree with what they believe. there's also a video that i have posted here, but i don't know how far back.