A self-identified "black person," has a highly unpredictable amount of actually African genes, and the common results of certain traits will depend on genes that may not cause self-reporting, so your conclusions will all be corrupted.
Are you seriously going to argue that self-reported black people are no less likely to have blue eyes and blond hair than the general world population?
Including the fact that genetic-causation of traits is a hopelessly flawed concept in the first place.
What? Do you deny that eye color, hair color, lactase persistence and blood type are genetically caused?
They are self-reported "black people" with significantly different DNA, including in their skin color, which is supposed to be a defining trait in terms of self-reporting.
I think you are referring to these two segments: Charles Barkley DNA Test, Snoop Dogg's DNA Test.
First, you somehow forget to mention that Charles Barkley also has more European DNA than Snoop Dogg. Snoop Dogg has more Native American DNA. Is the fact that Charles Barkley has lighter skin than Snoop Dogg so surprising given these data?
Second, I think you are attacking a strawman: nobody here is claiming that the precise skin tone can be perfectly predicted by DNA ancestry percentages.
Skin color is clearly only one of the various traits that concur in the conventional perception of racial appearance.
Indians, for instance, have a range of skin tones overlapping with sub-Saharan Africans, yet Indians are not commonly considered blacks, and they do not self-report as blacks.
If Snoop Dogg's DNA test found, say, 30% African DNA, you could claim to have at least identified one outlier. It wouldn't have invalidated the general claim that self-reported race is correlated with ancestry, since you aren't allowed to generalize from one example, but at least it would have been a data point against it.
But your own example didn't even show that: Snoop Dogg, a self-reported black man, has 71% African DNA.
I'm afraid you shot yourself in the foot.
In regards to having "primarily" Sub-Saharan African Ancestry, the cultural "one-drop rule" tendency to self-report as black with an African-American parent will also cause you to have self-reported black people who actually have less than 50% Sub-Saharan African DNA. So even that will be highly unreliable.
There are of course people with less than 50% sub-Saharan DNA that identify as black. Barack Obama is the most famous example.
Yet most people who identify as black have more than 50% sub-Saharan DNA.
Idang Alibi of Abuja, Nigeria writes on the James Watson affair:
An intriguing opening. Is Idang Alibi about to take a position on the real heart of the uproar?
Darn, it's just a lecture on personal and national responsibility. Of course, for African nationals, taking responsibility for their country's problems is the most productive attitude regardless. But it doesn't engage with the controversies that got Watson fired.
Later in the article came this:
This intrigued me for two reasons: First, I'm always on the lookout for yet another case of theology making a falsifiable experimental prediction. And second, the prediction follows obviously if God is just, but what does skin colour have to do with it at all?
A great deal has already been said about the Watson affair, and I suspect that in most respects I have little to contribute that has not been said before.
But why is it that the rest of the world seems to think that individual genetic differences are okay, whereas racial genetic differences in intelligence are not? Am I the only one who's every bit as horrified by the proposition that there's any way whatsoever to be screwed before you even start, whether it's genes or lead-based paint or Down's Syndrome? What difference does skin colour make? At all?
This is only half a rhetorical question. Race adds extra controversy to anything; in that sense, it's obvious what difference skin colour makes politically. However, just because this attitude is common, should not cause us to overlook its insanity. Some kind of different psychological processing is taking place around individually-unfair intelligence distributions, and group-unfair intelligence distributions.
So, in defiance of this psychological difference, and in defiance of politics, let me point out that a group injustice has no existence apart from injustice to individuals. It's individuals who have brains to experience suffering. It's individuals who deserve, and often don't get, a fair chance at life. If God has not given intelligence in equal measure to all his children, God stands convicted of a crime against humanity, period. Skin colour has nothing to do with it, nothing at all.
And I don't think there's any serious scholar of intelligence who disputes that God has been definitively shown to be most terribly unfair. Never mind the airtight case that intelligence has a hereditary genetic component among individuals; if you think that being born with Down's Syndrome doesn't impact life outcomes, then you are on crack. What about lead-based paint? Does it not count, because parents theoretically could have prevented it but didn't? In the beginning no one knew that it was damaging. How is it just for such a tiny mistake to have such huge, irrevocable consequences? And regardless, would not a just God damn us for only our own choices? Kids don't choose to live in apartments with lead-based paint.
So much for God being "just", unless you count the people whom God has just screwed over. Maybe that's part of the fuel in the burning controversy - that people do realize, on some level, the implications for religion. They can rationalize away the implications of a child born with no legs, but not a child born with no possibility of ever understanding calculus. But then this doesn't help explain the original observation, which is that people, for some odd reason, think that adding race makes it worse somehow.
And why is my own perspective, apparently, unusual? Perhaps because I also think that intelligence deficits will be fixable given sufficiently advanced technology, biotech or nanotech. When truly huge horrors are believed unfixable, the mind's eye tends to just skip over the hideous unfairness - for much the same reason you don't deliberately rest your hand on a hot stoveburner; it hurts.