It’s only a wake-up call if the callee is conscious. Britain, having been on the receiving end of a steady parade of wake-up calls on anti-Semitism, is either dead or in a coma. There’s one other possibility, of course: the UK is wide awake to the threat of anti-Semitism but is unbothered by it. Today’s stabbing attack in the Jewish area of Golders Green suggests the latter. After all, security authorities have been well aware that there is an Iranian proxy group paying people in the UK to go