I just don't see how the cover version of "Cadillac Car" should be considered as The Moral Substitute. Would anybody care to explain please?
When white "artists" covered black artists, they were seen as Mighty Whitey, which in a sense bore Unfortunate Implications in that they "cleaned up" the dirty images associated with Rock and Roll (rooted in black American culture) and "did it better" for the masses.
This film is apparently hated, unless people are talking about another film by the same name. I don't see why it is though; it doesn't look bad, and I remember it getting a lot of praise on release.
Hated by who? To my knowledge, the movie had a generally positive reception by critics and moviegoers, and it was up for several Oscars. Unless you're talking about anime and sci-fi fans, in which case an adapted musical about 60's R&B singers is probably not their cup of tea to begin with.