Daniel Pipes wrote this yesterday:

while my heart goes out to the many Iranians who desperately want the vile Ahmadinejad out of power, my head tells me it’s best that he remain in office. When Mohammed Khatami was president, his sweet words lulled many people into complacency, even as the nuclear weapons program developed on his watch. If the patterns remain unchanged, better to have a bellicose, apocalyptic, in-your-face Ahmadinejad who scares the world than a sweet-talking Mousavi who again lulls it to sleep, even as thousands of centrifuges whir away.