I really don't see a problem with the way his speech came off. The way I read it; he was using stereotypical phrases that white people perceived the way African Americans spoke in the past as well the present. Using the previous phrases he pretty much told the reality of how it was back then. all-in-all he pretty much said fuck you with a stereotypical phrased speech.
but then again we are white so we took a clever speech that was meant to knock us yet we some how turned it around. Go white people