By Michael Georgy CAIRO (Reuters) - An Egyptian court on Saturday banned the armed wing of Palestinian group Hamas and listed it as a terrorist organization, a ruling in keeping with a systematic *****down on Islamists by President Abdel Fattah al-Sisi. Sisi said on Saturday Egypt faces a tough, prolonged campaign against militancy. Hamas is an offshoot of Egypt's Muslim Brotherhood, which the authorities have also declared a terrorist group and repressed thoroughly since the army ousted one of its leaders, Mohamed Mursi, from the presidency in 2013. "We reject the Egyptian court's decision against Qassam Brigades.