I would have to peruse the raw data before I even believed that graph represented anything real. Racists have fabricated data for decades.
There is no such thing as "black" or "white".
Humans cannot scientifically be divided in this manner.
Even if the original post is complete nonsense and races aren't genetically distinct, that two people can have a physical property that's highly divergent and causes them to identify with two distinct cultures, and relate to their society in fundamentally different ways, leads me to believe that racial social differences are at least worth thinking about and looking at.
Reduce the issue to an organism as simple as butterflies. If one species of butterflies is divided by two colours with negative or positive survival value in reference to each colour, why are we served by saying 'the colour difference doesn't exist'? Humans are no different but the ramifications are more complex.
I'm not making an argument for discrimination or genetic disparity, I'm making an argument for the recognition that white, asian, black cultural differences exist, and have real ramifications in the world.
And so yes, in a sense there is such a thing as a 'white kid'. A white kid is someone more likely to be born from a long line of privilege, to be better educated, better fed, to experience less discrimination.. and so on.