Using intelligence stereotype scales to infer racism

Back in 2016, SocImages tweeted a link to a post entitled "Trump Supporters Substantially More Racist Than Other Republicans". The "more racist" label refers to Trump supporters being more likely than Cruz supporters and Kasich supporters to indicate on stereotype scales that Blacks "in general" are less intelligent, more lazy, more rude, more violent, and more criminal than Whites "in general". I had a brief Twitter discussion with Philip Cohen and offered to move the discussion to a blog post. Moreover, I collected some relevant data, which is reported on in a new publication in Political Studies Review.

---

In 2017, Turkheimer, Harden, and Nisbett in Vox estimated the Black/White IQ gap to be closer to 10 points than to 15 points. Ten points would be a relatively large gap, about 2/3 of a standard deviation. Suppose that a person reads this Vox article and reads the IQ literature and, as a result, comes to believe that IQ is a valid enough measure of intelligence for it to be likely that the Black/White IQ gap reflects a true difference in mean intelligence. This person later responds to a survey, rating Whites in general one unit higher on a stereotype scale for intelligence than the person rates Blacks in general. My question, for anyone who thinks that such stereotype scale responses can be used as a measure of anti-Black animus, is:

Why is it racist for this person to rate Whites in general one unit higher than Blacks in general on a stereotype scale for intelligence?

I am especially interested in a response that is general enough to indicate whether it would be sexist against men to rate men in general higher than women in general on a stereotype scale for criminality.