Of course it's about race. About the color and the history of black as the color of evil, never mind. I can't get any more lucid than to explain that I think

White folks calls you black, but I say not;
Caze de kittle musn' talk about de pot.

is saying the blackbird and the crow aren't any more evil, as stealers of corn, than the white men who call them 'black'. I don't have the attention span (literally), and the debate would (I believe) be better in its own thread.