Welcome to Denial Central, Tehran division. The question that leaps to mind: does Khamenei really believe this, or does he just know that there are millions of people so drunk with hatred of America and Israel that they’ll believe it? From AP, :
In comments made during a meeting with visiting Singaporean Prime Minister of Singapore Goh Chok Tong, Khamenei said: “We seriously suspect the agents of the Americans and Israelis in conducting such horrendous terrorist acts and cannot believe the people who kidnap Philippines nationals, for instance, or behead U.S. nationals are Muslims.” …
Numerous Islamic militant groups have claimed responsibility for similar operations in the country, including the beheadings of an American and a South Korean.