The Gaza health ministry said hundreds of people were killed. Israel later denied that it was carrying out air strikes in the area; the explosion, it said, was caused by a misfired rocket launched by Islamic Jihad, another militant group in Gaza. The scenes looped on news channels all night: ambulances, bodies, an explosion lighting the night sky. Hamas blamed Israel for the blast at Gaza’s al-Ahli hospital on October 17th. By the time Israel issued its denial, though, details had ceased to matter. The catastrophe had sparked protests in the West Bank and Jordan, and as far away as Tunisia. Is Israel justified to kill civilians in the name of fighting Hamas ?