Earlier quoted context omitted.
You realize there is not a small amount of data regarding racial IQ differences right? It is (was) one of the most studied social science fields before it fell out of fashion. You also seem to want to reduce something to skin-color that has been scientifically identified as more than skin color.
Please could up explain the point you're trying to make? The first sentence suggests that you think my point is lack of evidence is a problem, the second suggests you think my argument relies on one specific factor rather than being generalisable to all.
1) Your point is based on ignoring often repeated and consistent (over decades) science; and
2) I think your argument generalizes something (to skin color) that is very specific (I.Q.)
I will go further and say that I think you are being disingenuous about reducing the problems that affect different races to simply skin color.