'France in the only country in Europe where Jews are being killed at the moment'

Last month, the body of an 85-year-old grandmother was found stabbed and partially burnt in her Paris flat. Officials say Mireille Knoll was murdered because she was Jewish, the latest victim of a spate of anti-Semitic hate crimes in France. President Macron has already vowed to stamp out such acts, which average around 560 every year in France. But is he doing enough? And why is anti-Semitism so persistent? We ask Jean-Marc Dreyfus, a Reader in Holocaust Studies at the University of Manchester.