It examines the e-mail and the reaction (including the petition) in some detail.  The author notes:

Christakis believes that he has an obligation to listen to the views of the students, to reflect upon them, and to either respond that he is persuaded or to articulate why he has a different view. Put another way, he believes that one respects students by engaging them in earnest dialogue. But many of the students believe that his responsibility is to hear their demands for an apology and to issue it. They see anything short of a confession of wrongdoing as unacceptable. In their view, one respects students by validating their subjective feelings.