Mahmoud Abbas, the president of the Palestinian Authority, speaks in Cairo, Feb. 12. Photo: Amr Nabil/Associated Press Your editorial “‘Even Hitler,’ Says the Palestinian President” (Sept. 7) is right to note the virulent anti-Semitism of Mahmoud Abbas, the leader of the Palestinian Authority and Fatah movement. Mr. Abbas has spewed anti-Semitism for decades, and so has the PA, whose official media and educational arms also promote anti-Jewish violence. Elements of Fatah have even perpetrated recent terrorist attacks, as have the PA’s own security forces over the years. These actions violate the Oslo Accords, which birthed the PA in the hopes...