It might be best not to invite DePauw University professor Norman Finkelstein and Alan Dershowitz of Harvard Law School to the same dinner party anytime soon. Finkelstein, the author of several controversial books on the Middle East and the Holocaust, has baldly accused the law professor of plagiarizing in portions of Dershowitz's recently published "The Case for Israel." The always diverting and generally unreliable Nation magazine writer Alexander Cockburn has joined the fray in a just-published diatribe, "Alan Dershowitz, Plagiarist: Will Lawrence Summers Take Action?" You can read their indictment of Dershowitz on Finkelstein's website, www.normanfinkelstein.com. Before letting the fur...