That's a whole lot of text that does absolutely nothing to justify the stuff the parent comment is talking about. Let's be honest here: he was really smart and got away with being kinda an asshole a lot because of that (probably because at least some of the time his arrogance wasn't pointed at anyone and instead was genuinely funny, like his comments about not being able to lie about being "the world's greatest computer scientist" because he was under oath on a jury.
I personally don't think that being right ever excuses the method of delivery; there's always a way to be just as right and convincing without being an asshole, but it requires conscience choice. Dijkstra probably would have found this sort of insistence tedious and beneath him, and he wouldn't be wrong about being smarter than me and probably anyone else who would have expressed this to him, but like I said, I don't think that excuses it.
I personally don't think that being right ever excuses the method of delivery; there's always a way to be just as right and convincing without being an asshole, but it requires conscience choice. Dijkstra probably would have found this sort of insistence tedious and beneath him, and he wouldn't be wrong about being smarter than me and probably anyone else who would have expressed this to him, but like I said, I don't think that excuses it.