Senior Hamas politburo official Mahmoud al-Zahar reignited the war of words between his terrorist organization and Palestinian Authority (PA) Chairman Mahmoud Abbas's Fatah faction, which have long been bitter rivals. Hamas and Fatah have remained violently divided despite the unity deal sealed by Abbas in April 2014 when he torpedoed the US-led peace talks. In recent days - even as Egypt is leading talks in Cairo to try and unify the Palestinian factions - al-Zahar upped the ante on Hamas-Fatah tensions by slamming Fatah founder and arch-terrorist Yasser Arafat for being a "coward" and fleeing a battle with Israel, before...