When a former hostage walks onto a school stage in Israel today, the reaction looks more like a pop concert than a civics lesson. Teenagers scream, teachers wipe away tears, and phones rise in the air. On the microphone is not a famous singer. It is someone who spent weeks or months in Hamas tunnels, whose face Israelis first met on a yellow poster.Every society builds its own pantheon of celebrities. In the West, it is usually a familiar mix of powerful politicians, movie and television stars,