The law school at Harvard University in Massachusetts is seen in July. After a student group at Harvard blamed Israel for the violence, Lawrence Summers, a former university president, condemned the university’s leadership for not speaking up. (Billy Hickey/The New York Times) On Thursday, a vehicle trolled around Harvard Square bearing screens with the names and likenesses of some of the Harvard University students who had signed on to a public statement blaming Israel for the brutal attacks on civilian families within its own borders. Earlier, Bill Ackman, the billionaire CEO of Pershing Square Capital Management, had said that other...