I don't think the view that there are genetic racial differences in IQ is popular here, if that's what you're referring to. It's come up a few times and the consensus seems to be that the evidence points to cultural and environmental explanations for the racial IQ gap. When you said "human biodiversity", I thought you were referring to psychological differences among humans and the idea that we don't all think the same way.

My impression was that it is popular here, but I may be overgeneralizing from a few examples or other contexts.

The fact that no one else is saying it's popular suggests but doesn't prove that I'm mistaken.

IIRC, the last time the subject came up, the racial differences in IQ proponent was swatted down, but it was for not having sound arguments to support his views, not for being wrong.

More exactly, there were a few people who disagreed with the race/IQ connection at some length, but the hard swats were because of the lack of good arguments.