Commentary Do you recall the shrieking undergrad at Yale, the one yelling at professor Nicholas Christakis on the quad? As the professor spoke calmly to dozens of students surrounding him, at one point she commanded him to shut up, tossed a few f-words at him, and wondered how he ever got his faculty post in the first place. They were livid over an email sent by his wife, a lecturer at Yale, telling students to ease up on the “cultural appropriation” sensitivities as Halloween approached. (The Christakises were faculty residents in student housing.) The video of the event shows a crybullying, struggle-session process at work, and the inability of the professor to stop it. Across the country, as the video circulated across the Web, people were amazed that undergraduates spoke to distinguished Ivy League professors that way. It wasn’t so long ago that an action such as this one would …