I think it's nonsense. Rich is probably among the most brilliant software engineers on the planet but that has no bearing whatsoever on whether he needs to be polite and show human empathy and decency like everyone else does. You can be toxic and hostile and people will put up with it if you're useful enough (c.f. Linus) but we shouldn't be lining up, comment after comment after comment, to cheer that kind of behavior on.
Again, I don't think this is a big deal. I think that his rant is just a small indiscretion and we're all human, but I'm dismayed to see such an outpouring of support for exactly the position that you're putting forward. What I'm saying isn't "nauseating PC culture" as one GitHub commenter put it; it's just not being an asshole.
So, yeah, your comments are approaching "nauseating PC culture" because you can't read something like the original without being offended some how.