For a phenomenon often dubbed “the world's oldest hatred,” anti-Semitism is not well understood. From top Iranian officials who blame the Talmud for the international drug trade to British political activists who claim that the Mossad is stealing their shoes, anti-Jewish bigotry can be bewildering and bizarre. But given the prejudice's longevity, virulence and recent resurgence in Europe and America — witness the waves of bomb threats against dozens of Jewish centers nationwide in the past month and the controversy over the Trump administration's repeated refusal to include Jews in its Holocaust memorial statement — it's well worth debunking common misconceptions that impede our ability to fight it.