Opinion Columnist Pamela Paul writes:  The same week that a U.C. Berkeley protest ended in violence, with doors broken, people allegedly injured, a guest lecture organized by Jewish students canceled and attendees evacuated by the police through an underground passageway, a group of academics gathered across the bay at Stanford to discuss restoring inclusive civil discourse on campus. The underlying question: In today’s heated political environment, is that even possible? Over the course of two packed days of moderated and free discussion, we would try to test it out.