Members of the Jewish Community in Stamford Hill, London. Photo by Dan Kitwood/Getty Images It is a bad time to be a British Jew. Many are, rightfully, frightened. They are hiding visible signs of their faith: boys and men removing kippot from their heads; families taking down mezuzahs from their front doors. Many, like me, feel an overwhelming sense of disbelief and horror. How can so many people in the country we were born in hate us so much, for simply being Jewish? For that’s what anti-Semitism is: Jew hatred. For many years now, it has been routine to have...