Addressing "neo-conservatives like Krauthammer," Andrew Exum hits the nail on the head:
[W]hat is your endstate? Where are we trying to ultimately go? Are we trying to force a bloody crackdown on the protesters so the world can see how horrific the regime is and will then approve tough sanctions? Are we trying to start an armed confrontation with Iran? Just tell me what you are trying to acheive through a more openly confrontational stance and I'll listen. But for now, I suspect that one of the reasons Krauthammer, Kagan & Co. are criticizing Obama's tactics vis a vis Iran is because the majority of Americans would find their strategic goals they hint at but never reveal to be bat-guano crazy. Prove me wrong.
Their end-state is war.