By electing Ismail Haniyeh to head its political bureau, the terror group wants to show it is moderating – without, of course, accepting Israel By Avi Issacharoff Senior Hamas leader Ismail Haniyeh gestures to the crowd at a rally marking the 28th anniversary of Hamas’s founding, in Gaza City, December 14, 2015. (Emad Nassar/Flash90) Saturday’s announcement…