Hitler on the Hustings

Perhaps someone could explain to me why Mahmoud Ahmadinejad, the murderous hate-mongering, terrorist-financing, nuclear weapon building madman who is the President of Iran and one of the most dangerous lunatics on the planet today, why this guy is speaking today at Columbia University and tomorrow will address the United Nations?

Can someone explain this, please? Huh?

O.K. Columbia, I understand. Egghead City would sit through a rant by Adolph Hitler because it would confirm their unshakable believe in "Free Speech."

But, the UN?

And the formless cowards will not walk out?

And the Lunatic attacks Canada (???!!!) as a place with no justice or individual freedoms?