Columbia U. students organize: Ahmadinejad is not welcome here By Michelle Malkin  •  September 21, 2007 10:30 AM    Update 4:15pm Eastern. The American Congress for Truth has a petition to Columbia U. president Lee Bollinger. You can sign here.Update 3:30pm Eastern. Mahmoud is welcome at the National Press Club for a lunchtime videoconference. For crying out loud.*** As I mentioned yesterday, Columbia students on Facebook have been busy organizing a protest of the Iranian nutjob’s visit on Monday.Here are some details:WHEN: Monday, September 24, 1:00-3:00 WHERE: COLUMBIA STUDENTS (w/ Columbia ID’s): On campus, outside Lerner Hall NON-COLUMBIA STUDENTS: The Columbia...