Charly Triballeau/AFP via Getty ImagesColumbia Journalism School alumni descended into a heated row last week after a film director and producer who graduated from the school referred to some campus demonstrators as “murderous crackpots” and “pro-terror wack jobs,” prompting fierce backlash from other alumni in a Facebook thread.Norman Green, a 67-year-old Brooklyn-based producer and director who worked on True Life and Paranormal State—among other television shows, came under fire Thursday afte