David Horowitz CC '59 is an American conservative writer and activist. He wrote a book called The Professors: The 101 Most Dangerous Academics in America, listing nine Columbia professors, more than at any other university. The list comprised Lisa Anderson, Gil Anidjar, Hamid Dabashi, Nicholas de Genova, Eric Foner, Todd Gitlin, Manning Marable, Joseph Massad, and Victor Navasky.
Despite his attempts to defame Columbia at all costs, William Theodore de Bary likes him, and has proclaimed him "a good student". Because he remembers him when he was a student. In the 50s.