The whole point of firing rockets at Israeli cities is to inflict civilian casualties, and the fact that the rockets have largely failed to do so is due to their inaccuracy, Israel’s “Iron Dome” missile-defense system, and perhaps some good luck. Hamas’s strategy of launching rockets from residential areas and storing them in schools clearly reflects its leaders’ willingness to put Palestinian civilians in harm’s way in order to confront Israel with the grim choice of killing civilians or allowing the rocket attacks to continue.