They're Islamist, but I wouldn't say jihadist. I also wouldn't call Ghadaffi a progressive, seeing that most of the reforms the protesters were asking for were *progressive* reforms and that they just found a mass grave a prisoners that he had executed without a trial. Real progressive.
But I agree with you that Iran has no incentive to not get the bomb. Its their only guarantee for security. But, I will hold the caveat that Libya was only attacked because its ruler didn't follow the will of his people, and NATO feels an obligation to defend democratic movements, so when he didn't do what the people wanted, we sided with the people. It will always be like that. Tunisia, Libya, Egypt, Yemen, Syria. Its the same story. Bahrain is the anomaly, and Jordan and Algeria appeased their protesters successfully, so we're still friends with their rulers.
Also, we're not assassins. That is an overstatement.