In March 1968, Rachelle Halpern walked into her university in Szczecin, Poland, and found a group of her classmates gathered around a newspaper. She asked what they were reading about. The answer came: “Zionists.”Halpern didn't understand. Who were the Zionists? One classmate said, “The Jews.”“But I'm a Jew,” said Halpern. Her classmates looked at her in disbelief. She couldn't be, one said. She had no horns.Halpern was about to be swept up in a spiral of social and political crises in