It's so hilariously unreasonable to just blithely link a 3500 word article to explain your position on something you already wrote an 800 word article about, but I read it anyway, on the off chance that I'd missed soemthing and that this isn't some masterful troll.

Still, I don't see how an article which describes how genetic mutations produce differences in skin colour amongst others, is supposed to convince me that "skin color is an arbitrary factor that does not relate in any reasonable way to lineage."

Am I missing something? How is genetics unrelated to lineage or biology? And even if it was, which it clearly isn't, how does this support the notion that people are simply whatever race they say they are?

If you were arguing that we should all take DNA tests before claiming a particular heritage I'd say that was a little extreme, but I'd be able to see your point. But arguing that people should just be able to claim whatever heritage they feel like makes even less sense from your apparent position of scientific absolutism.