He thinks the IQ of white people (North America and Europe) is 100. He’s implying the rest of the world are lower IQ.
Both of those things seem like fairly reasonable hypothesis to me. You are the one inserting race into it.
The blogger cites a website which cites Richard Lynn for these 'facts'. So this is about race and IQ, quod erat demonstratum.
You are misrepresenting the author. He made no such claim. He did not articulate what he believes the underlying mechanism to be.
It would be perfectly reasonable to inquire about the mechanism, or question the accuracy of the prediction. It is not reasonable to make accusatory conjectures about his beliefs.