A comment like "How did they not die as babies, considering that they were likely too stupid to find a tit to suck on?" is only tolerated if you're Linus Torvalds or somebody like him that has contributed a lot and that is tolerated in spite of his character. And yes, the world is full of jerks that want to copy Linus Torvalds, or Theo de Raadt, or Richard Stallman, or Steve Jobs, or David Heinemeier Hansson, or whatever else ruthless leader with strong opinions that happened in this industry, but without the track record to back up their strong thoughts. Open Source is only special because the discussions are often public for anybody to see.
I do find Linus' behavior regrettable, as he's a very public person in this industry, his opinions do have legs and he is a role model for others. And I'm personally against PC talk, for example I think usage of the word "fuck" is totally legitimate because it implies passion, it implies that you care, but I think critiques should never be ad-hominem and people breaking this rule should get social punishment, including Linus.