This is about war, about children being indoctrinated, they are only in primary school and already fantasize about how when they grow up, they want to join the jihad, kill infidels. They refuse to play football with infidels, they say: “I’m not allowed to play football with you, but when I’m grown up, I will kill you, because you are an infidel.”

Wolfgang Trusheim, of Frankfurt’s State Security office