Chief Rabbi Efraim Mirvis has no lessons to teach Corbyn or the Labour party about racism. In fact, it is his own, small-minded prejudice that blinds him to the anti-racist politics of the left. His ugly message is now being loudly amplified by a corporate media keen to use any weapon it can, antisemitism included, to keep Corbyn and the left out of power – and preserve a status quo that benefits the few at the expense of the many.