The odd thing is that this issue is only explosive when people talk about groups that tend to underperform compared to Europeans (mostly African and Muslim world derived peoples).
When Gregory Cochran et al came out with their paper arguing that the Ashkenazi Jewish advantage in intelligence was not only hereditary but a product of natural selection, media outlets all over the west reported it as if it were just another interesting scientific theory (heck, some even bordered on celebration) - e.g. this nonchalant report by the very leftist economist newspaper:
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And Cochran was not attacked by the media/academia for it.
There was a documentary on political correctness in the SJW-land of Norway and in the episode on IQ, though some other IQ researchers were dismissed as extremists, Cochran and his theory were again portrayed nonchalantly:
[video=youtube;7R-hTToDRzs]https://www.youtube.com/watch?v=7R-hTToDRzs[/video]