No, I do not think Linus is at fault here. I think a more likely explanation is that (GNU/)Linux is the go to alternative operating system, and it gets a lot of cocky newbies who think they're special for using a Unix-like operating system.
My theory is that it's straight-up due to how many people use Linux compared to other non-Windows OSes and the fact the average people have more say (or think they do) compared to The One Apple Way. Any large group will have assholes, and the number of assholes is a simple percentage of the total.
In contrast, a disturbingly large number of Linux users remain willfully ignorant about other Unices and, worse, they attack them without knowing the first thing about them.
But yes, Linux users are dominant, so more idiots overall.
The parent poster was stating that OpenBSD also has a strongly opinionated leader at the top (Theo de Raadt) who has been known to rant and rave like the best, yet unlike the Linux community the OpenBSD community as a whole does not behave like that and ships functioning code quickly and efficiently.
Theo is unsavory but not abrasive. He is very principled and well-spoken.
Linus doesn't care who he offends, and he wears that chip on his shoulder with pride.
What is your definition of unsavory? I have seen him be blunt, but that is a long way from unsavory.