Well, for his accurate beliefs, let's look to another excerpt from
In Our Hands:
"The libertarian solution is to prevent the government from redistributing money in the first place. Imagine for a moment that the $2 trillion that the US government spends on transfer payments were left instead in the hands of the people who started with it. If I could wave a magic wand, that would be my solution. It is a case I have made elsewhere."
His eugenicist UBI is an alternative to his ideal proposal.
As a public figure with extensive writings, his internal state of mind does not matter.
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edit to respond because I'm "posting too fast":
> So as long as you don't write anything down or have yourself recorded as having said racist things, you can't be racist?
What? A logical statement does not imply it's converse. I'm talking about public figures like Murray here, not average private individuals. Besides, structural racism of the sort Murray advocates for has a much greater impact on material conditions than what some rando believes in their heart.