I might have more sympathy for this post if I only knew about it in the abstract and wasn't familiar with specific cases. For example, lately among Bay Area types, and especially the Rationalist community, there's been a surge of interest in eugenics and scientific racism, now euphemistically rebranded as "human biodiversity". It tends to take the form of hand-wringing about how "people from certain regions" have lower IQs and just how dreadful that is.
Just keep in mind that when Valley "thought leaders" complain about the lack of freedom to discuss ideas, those are the kinds of ideas they're talking about.