That's because only messages in which he is yelling at someone get posted here. AFAIK, most messages he posts are neutral, but these are boring, so they don't get posted here. I just scrolled through LKML and found a random example of his normal tone (https://www.spinics.net/lists/kernel/msg2852881.html):
"So none of the patches looked scary to me, but then, neither did earlier versions.
It's the testing that worries me most. Pretty much no developers run 32-bit any more, and I'd be most worried about the odd interactions that might be hw-specific. Some crazy EFI mapping setup or the similar odd case that simply requires a particular configuration or setup.
But I guess those issues will never be found until we just spring this all on the unsuspecting public.
Linus"
You're quiet right that Mr. Torvalds is not in some permanent state of rage and does not respond inappropriately to all, maybe even most, messages on the lkml. But the fact remains that he and thus his project have a serious problem with hostility. I could understand flipping out on someone who was paid to do a job and didn't even try, someone who was deliberately introducing bugs, etc. But a simple disagreement between highly intelligent and dedicated FOSS developers never calls for this sophomoric behavior.
Almost all organizations are highly dysfunctional...and in my experience particularly the ones that are intolerant of passionate discussion.
Example https://www.phoronix.com/scan.php?page=news_item&px=mty1mza
Glass door estimates Kay is presumably paid 80-160k for this work and people have somewhat a right to be angry if code like this is pushed.
This kind of out of context discussion that gives rise to comments like yours seems far worse than anything he has said.
How many CEOs have managed companies out in the open for 15 years plus without ever losing their cool? There is no way to know as there is no transparency.
However, your attitude is kind of what Linus intends to instill in those easily deterred by such behavior. He's not interested in your contributions if you're going to be a thin-skinned child about the development process and ongoing maintenance. Your contributions won't be perfect, and he's not interested in having to waste time beating around the bush in telling you so.