Two years ago I started wearing a Star of David necklace, for the first time in my life. The regular weekend hate marches had led to many Jews feeling so intimidated that they no longer felt able to be in central London on Saturdays. Added to that, the more general explosion in anti-Semitic incidents was creating an atmosphere in which many were worried about showing their identity as Jews. My reaction to such hate has always been to try to turn it on its head. So I bought a Magen David necklace, as we Jews call the Star of David....