Because he says stuff like this:
Osama bin Laden may be the most wanted man on the planet, but Iranian President Mahmoud Ahmadinejad said he has an idea where the terrorist leader is holed up: not a damp cave in the Middle East, but some far cozier setting in Washington, D.C.
The apparently sarcastic quip came during an interview with ABC News’ George Stephanopoulos as Ahmadinejad responded to a claim in new documentary “Feathered Cocaine” that bin Laden has been living comfortably in Tehran, Iran, for years.
“Your question is laughable,” Ahmadinejad said with a smile. “Our position is quite clear. Some journalists have said bin Laden is in Iran. These words don’t have legal value. Our position towards Afghanistan and against terrorism is quite clear… I don’t know such a thing. You are giving news which is very strange.
“I heard that Osama bin Laden is in Washington, D.C.,” he added.
When that remark was challenged, Ahmadinejad pressed further.
“Yes, I did. He’s there. Because he was a previous partner of Mr. Bush. They were colleagues in fact in the old days. You know that. They were in the oil business together. They worked together,” he said.
Sarcasm, like any other joke, needs a basis in truth. Someone should tell that to the pretend-president.