Bin Laden, an apostate and false prophet

Arrests Reveal Al Qaeda Plans (washingtonpost.com)

One of the Saudis told interrogators that he knew bin Laden well and had eaten with him dozens of times over the years. He said that until Sept. 11, bin Laden increasingly adopted the mantle of a prophet, preferring to speak through senior aides rather than interact directly with his followers.

Excuse me, but doesn't Islam teach that Mohammed was the greatest and last prophet? Why doesn't this pretense of bin Laden's to be God's spokesman on earth cause him to be treated as a heretic? Where are the fatwas against him? Where are the demonstrations and burnings in effigy?