Tense Ahmadinejad questions 9/11, Holocaust after blistering reception from Columbia president

NEW YORK — Iranian President Mahmoud Ahmadinejad questioned the official version of the Sept. 11 attacks and defended the right to cast doubt on the Holocaust in a tense appearance at Columbia University, whose president accused the hard-line leader of behaving like "a petty and cruel dictator."

Ahmadinejad smiled at first but appeared increasingly agitated, decrying the "insults" and "unfriendly treatment." Columbia President Lee Bollinger and audience members took him to task over Iran's human-rights record and foreign policy, as well as Ahmadinejad's statements denying the Holocaust and calling for the disappearance of Israel.

"Mr. President, you exhibit all the signs of a petty and cruel dictator," Bollinger said, to loud applause.

He said Ahmadinejad's denial of the Holocaust might fool the illiterate and ignorant.

"When you come to a place like this it makes you simply ridiculous," Bollinger said. "The truth is that the Holocaust is the most documented event in human history."

Ahmadinejad rose, also to applause, and after a religious invocation, said Bollinger's opening was "an insult to information and the knowledge of the audience here."

"There were many insults and claims that were incorrect, regretfully," Ahmadinejad said, accusing Bollinger of falling under the influence of the hostile U.S. press and politicians. "I should not begin by being affected by this unfriendly treatment."

During a question and answer session, Ahmadinejad appeared tense and unsmiling, in contrast to more relaxed interviews and appearances earlier in the day.

In response to one audience, Ahmadinejad denied he was questioning the existence of the Holocaust: "Granted this happened, what does it have to do with the Palestinian people?"

But then he said he was defending the rights of European scholars, an apparent reference to a small number who have been prosecuted under national laws for denying or minimizing the Holocaust.

"There's nothing known as absolute," he said.

He reiterated his desire to visit ground zero to express sympathy with the victims of the Sept. 11 attacks, but then appeared to question whether al-Qaida was responsible.

"Why did this happen? What caused it? What conditions led to it?" he said. "Who truly was involved? Who was really involved and put it all together?"