Of course, David, the cause is not skin color, we all know that. I don't recall ever using the word "cause" in this thread, and I wish people would stop equating correlation to cause. But as it has been pointed out,David N. Snyder wrote: That is fine, but you can't make the cause sound as if it is skin color when it clearly is not. It is obviously culture, socioeconomic status and other factors, nothing to do with color.
strong correlation between skin color and ethnicity
strong correlation between ethnicity and X
automatically implies a strong correlation between skin color and X.
I'll repeat again so that everyone understands: correlation does not imply causation, and correlation has nothing to do with cause. Drop the mental association between the words "correlation" and "cause".