In the last several years, the language of diversity has begun to creep into the lily-white world of symphony orchestras, and it’s a big mistake, says Norman Lebrecht. “Diversity, or the policy that speaks its name, is a means of diverting orchestras from what they ought to be doing, making music, to what the Government ought to be doing, creating social harmony… It amounts to a mirror image of Hitlerite policy which entailed the removal of non-aryan races from German music, even though this would relegate the art to the margins of civilisation.”