Censorship isn't the same as having community rules for positive discussion and sticking to them. The latter implies consent -- if you don't agree with the rules, participate and voice your speech somewhere else.
You can be a free speech absolutist and still think it's a bad idea to shout fire in a theater. Being against censorship doesn't mean you welcome anyone into your home to shout whatever the heck they want.
Also, perhaps you should review them again:
Be kind. Don't be snarky. Have curious conversation; don't cross-examine. Comments should get more thoughtful and substantive, not less, as a topic gets more divisive.
Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith.
Eschew flamebait. Don't introduce flamewar topics unless you have something genuinely new to say. Avoid unrelated controversies and generic tangents.
Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something.
Please don't use Hacker News for political or ideological battle. That destroys the curiosity this site exists for.