Seeing the rest of the thread really contextualizes Linus' anger.
Only seeing the message from Linus makes him look like a dick. But when you see that he's responding to someone deflecting blame and being a shithead to the guy trying to report a problem and provide a suggested fix, the aggressive response seems more justifiable.
Yes. I did not include patch from first person in screenshot because I thought it would make it too boring to read. But it kinda adds even more to context.
Replying to "I get this regression with KDE on this system caused by this commit and here how I fixed it" with "lol, pulseaudio sucks, opensuse sucks" of course will make Linus angry and he will reply not only "no u", but also "and here's why".
Okay, I agree that this is a really dickish way to respond to a dev, and I can see Torvald's message being as much an olive branch to app devs as it was a thorough humbling of the maintainer. Still wouldn't call it professional, but... I get it.
Honestly, with this response although I think he didn't deserve all of that from Linus, he did deserve quite a bit of it. So condescending and smug to application developers that actually make the user experience of Linux a good thing.