Not every pull request needs to be introducing complex/intricate code, and yet it still has value to the project (and the community).
Usually when mailing list messages or PR comments are posted to HN, they are about something very negative, either the attitude of the author (random examples - mails by Linus, mails by Poettering, and sometimes also mails by Theo) or the content of the request it replies to. And in the openbsd community does has some negative reputation about harsh communications.
Just wanted emphasize it, since seeing good examples is much more educating IMHO than seeing only negative ones.
Or are you just referring to his communication when defending his own codebase?
Linus Torvalds can be plenty kind when he wants to be. And John Carmack has also done his time being a jerk.
What people are saying is that the kind approach is their preferred default.
Citation Please.