That's what's in the CoC that's objectionable.
> made me think that someone had disparaged them for their political beliefs
Funny how you do that in a post that disparages him for his political beliefs. But your post is nothing compared with the attacks elsewhere in this thread. Scroll down and read a bit, and you'll see plenty of that happening.
Before you say "but it's not about excluding people", let me remind you about James Damore and Brendan Eich. Those were valuable people, attacked and damaged because of their (in Damore's case PERCEIVED, not real) political beliefs. We all know that the majority of Hacker News supported those actions (although how many supported them because they were afraid to be attacked, and how many actually supported those actions is not clear).
And why do people do this ? Attack others for political reasons ? Most, of course, because they're afraid of SJWs. Because of what happened to Damore and Eich and many others. But SJWs, ostensibly, do this for tolerance of course ! THAT's why they're EXCLUDING people for their political views. For tolerance.
Alaternative view: the SJWs are just socialites looking to exclude others, that's all. Aggressive and ... not interested in the only thing that matters : technically interesting work.
I commend this person for speaking up.