Last Thursday night in western Berlin, beneath the wartime ruins of the Kaiser Wilhelm Memorial church, police in riot gear watched a group of 60 people, mostly younger and many wearing headscarves or keffiyeh scarves. Their chants left passersby with little doubt about why they were there: “Israel, the child murderer, financed by Germany”; “Zionism is a crime, keep your hands off Palestine”; “F**k you Israel! F**k you Germany, you will all go to hell!”; “There is only one solution: intifada revolution”. After several rounds of chants, police moved in and picked nine people out of the crowd and detained...