Let's not overthink this: John Derbyshire is a racist. Declaring such does not require an act of of mind-reading, it requires an act of Derbyshire-reading:
I am a homophobe, though a mild and tolerant one, and a racist, though an even more mild and tolerant one, and those things are going to be illegal pretty soon, the way we are going.
I guess it's admirable that Rich Lowry is taking time away from pondering why people think he's a bigot, to denounce Derbyshire. But 'Derb' told you what he was in 2003. And National Review continued to employ him. That's who they are.
What else is there?
We want to hear what you think about this article. Submit a letter to the editor or write to firstname.lastname@example.org.