U.S. and Libyan officials are investigating evidence the attack on the U.S. consulate in Libya that killed the ambassador and three American staffers was a planned effort by Muslim jihadists using a protest against an anti-Muslim film as a pretext, but the controversial Council on American-Islamic Relations thinks a "right-wing extremist" ultimately was to blame.

The tweet from CAIR's national organization said: "Meet The Right-Wing Extremist Behind the Anti-Muslim Film That Sparked Deadly Riots."

The message included a link to a blog post by journalist Max Blumenthal which contended "the rioting was provoked by an obscure, low-budget anti-Muslim film called 'The Innocence of Muslims.'"

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