Well, if Linus had actually called someone a moron "upon receiving a pull request on GitHub" like the post claims, then I think it would be a perfectly legitima

Well, if Linus had actually called someone a moron "upon receiving a pull request on GitHub" like the post claims, then I think it would be a perfectly legitimate criticism. Calling someone a moron just for trying to contribute would be completely unacceptable, especially for someone like Torvalds. Of course, the problem is that Torvalds did not call someone a moron for submitting a pull request. He was responding to another person's comment on the request that has since been deleted. I think the lesson here is that GitHub maybe shouldn't let people delete their posts after they've been replied to.