Despite the Arab and international pressure to forego certain positions held by Hamas, the Palestinian Islamist group is still holding firm and has frozen indirect negotiations with Israel until further notice. The Hamas’s decision came after the assassination of its political bureau chief Ismail Hanyieh, 62, in Iran last week, who also led the Palestinian negotiating team. Israel is accused of carrying out the killing, but has not confirmed officially. “Hamas will not succumb to any Arab or international political pressure to return to negotiations with the enemy before getting written guaran…