It's your prerogative to follow trends to determine what you find worthy of your time or not, but it's not a good thing to suggest that anyone that tolerates that type of language better than you do or even enjoys it, lacks self respect.
A lot of people find that cockiness funny and find the informality welcoming. And many of those tend to find cold formality, fake humility or lack of self-confidence as signs of something being boring, uninteresting or outright creepy.
EDIT: Comment was edited, original:
It's hard to believe this came from a place of humor after reading the otherwise dry article. The article was otherwise fairly interesting, but that certainly left a sour taste in my mouth. He's lucky I read past the first paragraph, if it wasn't so prominent on HN I probably wouldn't have bothered listening to anything he had to say.
I guarantee you would not find it funny if I called you a cunt. Remember none of the rest of the article even remotely matches the tone of the sentences in question, and the content larges comes from a place of ignorance.
Actually there have been a couple of times when people called me a cunt and it was funny in context. Now granted, whether this article is that kind of context, is a different question.