With all due respect to falafel and schnitzel, if we were to conduct a referendum to choose our national food, there’s no doubt that hummus would win, big time. But we’ve got to be truthful: We adopted it from our neighbors, and not all that long ago, either. The War of Independence in 1948 exposed many Israelis to the Arab kitchen for the first time, and hummus caught on because it went well with the...