They are naturally and righteously bitter about the annoying status of secretive manipulations in our version of free-market capitalism. Their reaction to you, however, is simply because you are being an obstreperous asshole.
This reaction is uncalled for, especially for hackernews. I've been nothing but level-headed and fair, even though I disagree on the topic.
If you're looking for someone to criticize, you should look at your own behavior: "Fairly obvious, right?" an unsubstantive, smug, miserable response to my question, setting the tone for our interactions.