OPINION: Back in December, the eminent historian Niall Ferguson wrote an essay in The Free Press that, it is now apparent, presaged the tidal wave of demonstrations now inundating college campuses around the country. It was called “The Treason of the Intellectuals,” which was also the title of a 1927 publication by the French philosopher Julien Benda. Mr. Ferguson notes that while that piece was written six years before Hitler came to power, German universities — then the world’s best — were