1) Iran do in fact strive to get its own nukes. Who doesn't these days. What's wrong with it?
Only 6 countries are officially 'allowed' to have them, still India, Pakistan and Israel have them too.
South African Republic is also rumored to have them. Who's to decide which country is 'developed enough' and which is not? Who gave this right to judge to these 'developed' countries? Besides all the attempts to keep the lid of the nuclear box closed is absolutely futile. Sooner or later other countries will get the nukes of their own. You can't stop this tide.
2) Israel feels that Iran threatens them so sooner or later it will get ballsy enough to attack. With or without help from USA. US apparently wants to stay out of it, but Israel pushes it into this war.
Strangely enough Saudi Arabia and Qatar also want this war to happen so I think that it's inevitable now.
I only hope Iran would have enough means to defend itself (probably with the help of Russia and China).