What Linus is saying is: if you don't agree with me, you're an incompetent developer, get out of the way and shut up, and I don't want to hear any counter-argument.
It's a means of quality enforcement, to some degree. OK. But there is a point where it goes too far.
I don't insist on political correctness. I haven't complained about Linus' normal insults but he's telling people to kill themselves... it's a step too far.