Eminem and David Mays have much in common. They're multimillionaires, they're white guys, and they made it all in the rap business. In addition, both have enormous persecution complexes. Eminem's paranoia is famous. "Half you people got a f______ problem with me," he raps on Till I Collapse. Mays, who started the hip-hop magazine The Source on a photocopier 15 years ago and turned it into the top-selling rap publication, is less celebrated but just as tortured. "The Source is constantly disrespected and bashed," he says. "It hurts."
The irony is that most of Mays' wounds have been self-inflicted during a...