I'm white myself and was just listing slurs I've personally heard. Peckerwood, whitey and white trash are all considered pretty offensive where I'm from. The words may look a bit silly when they're typed out but you're missing the contempt and hatred that comes along with it when someone looks you dead in the eyes and calls you a slur.

The point is that they reduce you to a single feature, and display a clear disregard for your personhood. Perhaps being entirely unaffected by slurs is a bit of white privilege I've never felt and they genuinely don't bother most people but idk