It has been written that the minstrel shows were modelled after a sort of entertainnent that black slaves engaged in, where they parodied various and sundry folk, mostly white, with exaggerated movements, funny voices, and all sorts of mocking characterizations--

Stephen Foster's songs were minstrel songs, and, I believe, he had his own minstrel troupe--

I think that the point that rock and roll was a white copy of black music is an important thing to consider--it seems that most of America's popular entertainment is white people trying to imitate blacks--

In the Year of Jubilo was written by an Abolitionist--Henry Clay Work, I believe--

As to the term "shine", it is right in there with "coon" on the list of highly inappropriate racial epithets-- "Pardon me, boy, is that the Chattanooga Choo-Choo? Track Twenty Nine! Boy, you can give me a shine!!"