Iranian President Mahmoud Ahmadinejad came to the US a weak man. His promises on the economy are unfulfilled, his ability to govern a joke. He left a hero to the Iranian people and probably a hero to much of the Arab world too.

Bollinger clearly had an American audience in mind when he denounced the Iranian leader to his face as a “cruel” and “petty dictator” and described his Holocaust denial as designed to “fool the illiterate and the ignorant.” Bollinger’s remarks may have taken him off the hook with his domestic critics, but when it came to the international media audience that really counted, Ahmadinejad already had carried the day. The invitation to speak at Columbia already had given him something totalitarian demagogues — who are as image-conscious as Hollywood stars — always crave: legitimacy. Bollinger’s denunciation was icing on the cake, because the constituency the Iranian leader cares about is scattered across an Islamic world that values hospitality and its courtesies as core social virtues. To that audience, Bollinger looked stunningly ill-mannered; Ahmadinejad dignified and restrained.

Back in Tehran, Mohsen Mirdamadi, a leading Iranian reformer and Ahmadinejad opponent, said Bollinger’s blistering remarks “only strengthened” the president back home and “made his radical supporters more determined,” According to an Associated Press report, “Many Iranians found the comments insulting, particularly because in Iranian traditions of hospitality, a host should be polite to a guest, no matter what he thinks of him.

It’s more than that the Presidency of Iran is a very weak office. One need only look at his the failure of predecessor, Mohammad Khatami, an erstwhile reformer, to engage in even the most mild of anti-corruption activities.