Jenin has endured plenty of rough days lately, but May 21 outdid them all. In the course of one hour in the morning, snipers killed seven of the city’s residents, all of them innocent passersby, even though the streets were quiet and the soldiers had no cause to open fire.

They shot from high up in two buildings, called Rabia and A-Rein, just outside the camp, and the dead included two teenagers and the director of the surgical ward at the Jenin Governmental Hospital, who was just getting out of his car in the hospital’s parking lot.