Yet I personally had an old guy try to convince me that the mark of Cain was real, and that all blacks had it.
Just because the Bible has not a trace of racism, doesn’t mean that a human is incapable of finding blatant racism in it.
The Shulamite is described as black, yet beautiful, as if beauty is an anomaly for anyone black...
I don't think this reference is to a black woman. The Shulamite was almost certainly an Israelite girl.
But she worked in the fields and vineyards and was therefore tanned. In most societies throughout history, beauty is associated with wealth.
Wealthy women don't have to work outside and don't get tanned, so paleness in these societies is generally associated with beauty.
BTW, this all changed when most people began working in offices or factories. Being tanned meant you could afford to be outside lounging on the beach or playing tennis, so IT became a sign of wealth and privilege and therefore of beauty.