It was a scene typical of the times in Israel. On a Be'er Sheva bus carrying mostly elderly Jews, an Arab boy began singing out loud in a way that seemed calculated to convey his disdain for his fellow passengers. Repeated attempts by passengers and the driver to get the boy to pipe down only resulted in more disruption, as the boy was joined by another, younger boy, in their annoying song. Push came to shove, shove came to kick, and the boys were taken off the bus, which drove away – but not before the boys had thrown a...