There were no Iranians or Shiite Muslims among the attackers on 9/11.
Iran was the first Islamic country to condemn the 9/11 attacks.
Iran cooperated with U.S. and coalition forces to defeat the Taliban in Afghanistan.
Al-Qaeda and the Taliban have never been friends of Iran, and Iran has never funded or supported either group. Arab countries supposedly friendly to the U.S. have provided major sources of funding for both.
The greatest threat in the post-Cold War world, says Douglas Johnston, is the prospective marriage of religious extremism with weapons of mass destruction. Yet the U.S. spends most of its time, resources, and weapons fighting the symptoms of this threat, not the cause. The diplomacy of the future, he is showing, must engage religion as part of the strategic solution to global conflicts.