Columbia University assistant professor Shai Davidai has been temporarily banned from the university’s campus for harassing students and staff. Millie Wert, the university spokesperson, told The Columbia Spectator that the university was not attempting to restrict Davidai’s freedom of expression but limit his threatening behaviour. “Columbia, however, does not tolerate threats of intimidation, harassment, or other threatening behaviour by its employees,” Wert said. Davidai announced his suspension in a post on Instagram on Tuesday, saying: “The University has decided to not allow me to be on c…