You might have seen John Coatsworth, the acting dean of Columbia's School of International and Public Affairs posing questions to Ahmadinejad today. It was Coatsworth who declared that he would invite Hitler to speak at Columbia.

He was also a signatory to a "Joint Harvard-MIT Petition for Divestment from Israel" when he was a professor at Harvard. See his name here. That petition begins: "We, the undersigned are appalled by the human rights abuses against Palestinians at the hands of the Israeli government, the continual military occupation and colonization of Palestinian territory by Israeli armed forces and settlers, and the forcible eviction from and demolition of Palestinian homes, towns and cities."

Apparently, it is fine to host dictators but not to invest in democracies.