It is sane but not rational, sometimes factually correct in places, highly offensive, and inflammatory. I don't use Clojure and reading it makes me never want to use Clojure.

Everybody is entitled to say (but not dictate) how something should work. Holding and expressing opinions is an innate human right, and the developed world only takes it away in extreme circumstances. Talking about open source governance is not an extreme circumstance.

We are not legally entitled to basic politeness, but politeness is enforced socially rather than morally, and failing to be polite means risking social consequences. If I used Clojure and I read the linked article, I would avoid hiring Cognitech, which is the exact problem Rich mentions.

You might need to go back and read that one again, this is the faintest criticism of a lengthy screed in which the person you are replying to labels user-hostile behaviours as "acting like a jerk" and generally disapproves.

Your counter argument to this is to just be contrarian and imply they are a jerk... because, well, you don't agree with them. You didn't add substance to the discussion (facts, evidence, argument seeking middle ground), you just sought to set fire to someone because you were uncomfortable with the dim prospect you might be wrong/guilty of acting like this/be the subject of the criticism.

Do you see how this undermines your point of view/actually re-enforces the validity of the criticism?