I'm inclined to disagree on all points.
As sundvor already pointed out, Linus's cursing works. He uses it for emphasis, to bring attention to bear where it's needed. Being polite would likely be less effective.
> If a specific individual is unable to communicate without that, that's a totally different matter - being able to accommodate a wide church of people is a crucial diversity matter.
So shouldn't you be OK with Linus cursing?
I disagree here too, though. Cursing is a choice, not a disability.
If, say, a firm fires someone for failing to maintain a civil tongue, I'd hardly call that a diversity problem. It could be quite reasonable, depending on the firm.
> I'm arguing against that the notion that this approach is necessary, not that it shouldn't be accommodated
Define 'necessary'. Would the kernel implode if Linus were more polite? Of course not, but I still agree with sundvor that Linus uses it as an effective tool. He's not just an angry child with poor impulse control.