On a recent Sunday afternoon at a Rami Levy supermarket in the West Bank, an Israeli soldier patrolled next to a rack of toothpaste, on a two-for-one sale. Outside, Israeli and Palestinian customers walked through a new black metal detector on their way in; it was installed just an hour before.Rami Levy, the founder of the eponymous discount supermarket chain, touts his stores as an example of coexistence in the Israeli-occupied West Bank, where Jews and Arabs work and shop together. It's an image that Palestinian activists have rejected as a mere illusion of harmony when Israelis control the land...