From the NYTimes:

For one thing, there isn’t actually any such thing as Islamofascism — it’s not an ideology; it’s a figment of the neocon imagination. The term came into vogue only because it was a way for Iraq hawks to gloss over the awkward transition from pursuing Osama bin Laden, who attacked America, to Saddam Hussein, who didn’t. And Iran had nothing whatsoever to do with 9/11 — in fact, the Iranian regime was quite helpful to the United States when it went after Al Qaeda and its Taliban allies in Afghanistan.