Unless these children planned to stay in a place with exactly the same demographic mix forever, I don't see how that's relevant. And even if they did, "the author" thinks that eight year old children shouldn't be having their heads filled with ideas that most adults aren't mature enough to process.

If you tell a child that the colour of their skin disadvantages them relative to somebody else. If you tell the that they're on a pecking order where their hard work and personality and talents are less important to their rank in the world tham characteristics that they can't change, you not only decieve them (I speak from experience when I say that my power is not diminished in the slightest by the colour of my skin), but you damage their self image in ways that some of them won't recover from.

You seem to be precisely one of the well-meaning but hopelessly confused people I'm talking about. Which is probably why you felt attacked by an article that tens of thousands of people understand and agree with. Maybe that fact should at least give you pause.