DeliciousCake

"Professionalism" is a way of acting, speaking, and behaving so as to be non-offensive. Professionalism is the definition of the problem here. He was quite the professional coder ( in terms of compentency pointing out the issue) but not his language. Demanding professionalism is a just a way of demanding he self censor.

Linus Torvalds himself has been and remains an asshole and would have responded very similarly. Demanding politeness is a form of censorship. Notice how all the previous commenters mostly ignore the very valid issue raised simply due to the presentation of the idea. The guy raised a huge issue and was not being taken seriously.