(American Power) Gilad Atzmon, whose book Mearsheimer blurbed, is a despicable and ugly Hitler apologist and Holocaust denier. What's also particularly disturbing is that Professor Stephen Walt joined the debate to explicitly defend Mearsheimer against the allegations of anti-Semitism.
Related: The title at Goldberg's entry is not subtle: "John Mearsheimer Endorses a Hitler Apologist and Holocaust Revisionist." David Bernstein, at Volokh, "A Challenge to John Mearsheimer", Bernstein links to Pejman Yousefzadeh, and here's another from Pejman that's vital: "John Mearsheimer Further Beclowns Self. Film at Eleven.", And here's this from David Rothkopf, "Mearsheimer picks a winner: Finally, a revealing book jacket blurb", Rothkopf's reference is the the post by Mearsheimer at Stephen Walt's blog at Foreign Policy, "Mearsheimer responds to Goldberg's latest smear.", this Harry's Place entry is probably the most precise examination of Gilad Atzmon's anti-Semitism: "Mearsheimer and Walt defend antisemite who thinks Hitler will be proved right."