The issue is this: the Ayatollah Khameineis of the world, and for that matter the Obamas of the world, would be powerless if it weren't for the evil traitor Jews and Christians who suck up to and enable them. So, based strictly on that criteria, I would have to say Tzipi Livni is the worst of the four.
I scarcely think that extreme self-hating traitors like Bernhard are in the least less anti-Semitic than professional Nazis like Buchanan. I guarantee you that privately, Bernhard too denies the Shoah, or else thinks the Jews deserved it. I doubt she would ever publicly indicate that she feels that way, like Buchanan does, but Jew-hatred is Jew-hatred, regardless of where it originates from.