I know, I know. We’re a handbrake turn away from the apocalypse and here I am writing about a rapper. Bear with me. There will be a point. First up, though, let’s begin by acknowledging that we cannot know whether Kanye West, the erstwhile headliner of London’s doomed Wireless festival whose visa was revoked earlier this week, is truly a Nazi. All we can know for sure is what he said and did, which included one song not even a year ago called Heil Hitler and another called Gas Chambers, and a line of T-shirts and other merchandise with swastikas...