The part of pg's comments that relates to your comments is this part:
"Saying that an author lacks the authority to write about a topic is a variant of ad hominem—and a particularly useless sort, because good ideas often come from outsiders. The question is whether the author is correct or not. If his lack of authority caused him to make mistakes, point those out. And if it didn't, it's not a problem."
But in general, Paul Graham isn't saying anything that is novel to this site's comment guidelines:
Be kind. Don't be snarky. Have curious conversation; don't cross-examine. Please don't fulminate. Please don't sneer, including at the rest of the community.
Comments should get more thoughtful and substantive, not less, as a topic gets more divisive.
"Don't be a dick, because plenty of people are smarter than you, and even people who are not smarter than you can come up with really good ideas and perspectives."
