Osama bin Laden is a huge folk hero in the Muslim world. His popularity rating among ordinary Muslims surged to nearly 80 percent in the aftermath of 9/11. It has plunged (but not among the youth) lately only because he hasn't been able to pull off an encore. Thank God for the Marines, Rangers, and Special Forces.
But make no mistake about it. If al Qaeda manages to detonate a nuke in an American city and kill hundreds of thousands or millions of US citizens there will be nonstop mass jubilation in Muslim countries around the world, and bin Laden's popularity among ordinary Muslims will surge through the stratosphere again.
There will be official lip service denouncing the attacks as a betrayal of "true" Islam, but the majority of Muslims worldwide will be beside themselves with joy, just as they were on 9/12/2001.
If 80% of Muslims are pro-Jihad how is it that virtually every single expert on the mid-east [Michael Ledeen, Micheal Rubin, Richard Perle, Newt Gingrich] say that Muslim Iran is the most pro-American country in the region if not the entire world.
Polls show Iranians are far more pro-US than most European nations.