Like that Army psychiatrist at Fort Hood?
"Major Nidal Malik Hasan, who allegedly killed [13] people before being shot and wounded by police at Fort Hood, had said Muslims should "rise up" and attack Americans in retaliation for the US war in Iraq, a former army colleague said."
"He said Muslims should stand up and fight the aggressor and that we should not be in the war in the first place." He said that Major Hasan said he was "happy" when a US soldier was killed in an attack on a military recruitment centre in Arkansas in June. An American convert to Islam was accused of the shootings.
Col Lee alleged that other officers had told him that Major Hasan had said "maybe people should strap bombs on themselves and go to Times Square" in New York."
http://www.telegraph.co.uk/news/worldnews/northamerica/usa/6511591/Fort-Hood-shooting-Nidal-Malik-Hasan-said-Muslims-should-rise-up.html
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"Soldiers reported that the gunman shouted "Allahu Akbar!" - an Arabic phrase for "God is great!" - before opening fire, said Lt. Gen. Robert Cone, the base commander."