Could certainly be less confrontational, but in this case, it doesn't really feel so unwarranted, in large part because coming from Linus regarding the Rust for Linux project, a stronger expression of frustration feels justifiable. It's a lot different than the real-life "toxic" communication I've witnessed, where the harshness is strictly one-sided and feels unjustifiable.

But I guess the line will be up to taste. I've been on the receiving end of harsher communication that I don't feel was completely uncalled for, too. I certainly can be a stubborn person and sometimes reasonable communication just isn't getting the message across. On the other hand, there are people who basically never do anything to warrant being communicated to like this. It would be ideal if everyone could communicate calmly and always get the message across, but frankly it just doesn't seem to work that way.