It's not the contributors personal attitude that's in question here but his attitude towards breaking user space, so it's not even ad hominem or anything.
> Eric, I want to make this 1000% clear: there are no user space bugs.
> If it used to work, then user space was clearly doing the right thing.
> The fact that you tried to several times claim it was buggy user space is a serious breach of trust.
I find Linus' wording remarkably polite. Surely you're not suggesting that Linus should accept breakage of user space out of sheer politeness?