But black=bad doesn't have racial connotations. It comes from darkness=scary. The unknown can be dangerous. Yaddy yaddy. I know a lot of people like to make the black=bad=racist argument, I just don't think it's a very good one.
But I could understand why a black guy might not like the fact that black=bad, but perceived racism isn't the same as real racism.
In all seriousness it makes a lot more sense that an insult is based on comparing someone to a totally despised and subjugated
person who exemplifies all that is considered low and degrading in society than the rather abstract and neutral concept, 'the dark'.