Room 101 of the Berlin district court is a gloomy place of grey linoleum, wooden panelling, grand brass lamps and a huge chandelier. Sitting upright at the wooden defence table was a young woman with black hair and anxious dark eyes. Egyptian-born Aya (25) was here because, a year ago at a pro-Palestinian march in Berlin, she shouted: “From the river to the sea, Palestine will be free.” For Aya, who has lived and studied here for three years, it was a statement of support for the Palestinian people. Hours before the protest, she heard from a Palestinian acquaintance that...