Nine of the "101 Most Dangerous Academics in America" teach at Columbia University, according to a new book by conservative activist David Horowitz. The book, "The Professors: The 101 Most Dangerous Academics in America," published by Regnery, profiles 101 professors from campuses across the country. "Columbia is a national scandal," Mr. Horowitz told The New York Sun in a telephone interview. "That a serious, top-tier university ... is an ideological fortress is an emblem of the utter debasement of the academic endeavor." His book lists several professors from the university's department of Middle East and Asian languages and cultures, including...