Jonathan Garfinkel is the author of the novel In a Land Without Dogs the Cats Learn to Bark and the memoir Ambivalence: Crossing the Israel/Palestine Divide. Last week, I woke up to a text from a friend. “Do your neighbours know you’re Jewish?” “I don’t think so,” I wrote back. I’m a sometimes-practising Jew; I don’t have a mezuzah on the entrance of my door, nor do I wear a yarmulke. “Why?” “Someone has marked four homes of Jews with stars of David.” “Right here in Berlin?” “Yes.” Berlin has always felt like freedom to me. It’s not without complications:...