The "Magic Negro" song was mocking a racist left wing editorial in the LA times. Here is that editorial:They're probably thinking of these gems
Obama the 'Magic Negro'
The Illinois senator lends himself to white America's idealized, less-than-real black man.
www.latimes.com
But of course you didn't know that...you're just into painting people as racists.
BTW, that song the Magic Negro was produced by this guy, who is Rush's right hand man: