merica, the hypocrite! Sweet as apple pie, Childish Gambino’s latest offering — the Hiro Murai-directed visual “This Is America” — is delicious. Delectably distorted metaphors, both verbal and visible, represent the contrived Stepin Fetchin stereotypes that continue to plague these un-United States. Gambino demonstrates how pursued happiness is mocked by the Have’s asphyxiating ignorance and their misplaced fear. Melanated skin ignorantly associated with Sin continues …