Then why are the Leftist professors in the article so opposed? Why are they comparing her work to climate change denial and Holocaust denial? Why are they so opposed to the obvious logical conclusion
Because you have to adjust your mental model to explain IQ differences in ethnic groups. That really shouldn't be a problem, but it's my best guess as to why.
All people turn anti-science, anti-curious reality deniers when they feel their cultish extreme views are threatened by questions. And some turn into nasty hateful bullies.
A leftist is not immune, and a professor is certainly not immune to this.