Ender Cetin and Igor Itkin only visit Berlin schools together. For 90 minutes, the imam and the rabbi take over the classroom. On one visit, the group of ninth grade teenagers at the Otto Hahn Secondary School in Berlin-Neukölln are already sitting in the circle of chairs when they get started. Around 20 pupils, including Arda, Taylan, Jihad, Jamiro, Mahmoud and Ilayda, look at the unlikely couple. These students’ families come from Algeria, Egypt, India, Syria, Albania or Turkey. There is also a Kurd from Iraq. For the imam and the rabbi, this is the norm. They often have classes in front of …