I actually get downvoted for saying blasphemy like this:
"Actually there were no HTML5 stuff shown in the demo, I can code those effects to work with IE6. In fact that demo may even work in IE6 if you would include some hacks."
I may be alone in this, but I like expressing my thoughts/feelings, as a matter of fact, most of the time I want to make it really clear that what I say is just my the way I see it.
I grew up in a blunt, German family. Very straight forward, often crude. I am, as a result, one to speak my mind. Effective criticism is best delivered from a high position: hyperbole and mistakes like "my the way I" debase an otherwise salient point.
A good insult is like a fine, dry wine; it is bitter and refined. You come across in your comment history as a dullard, enamored of his own ability to shout at crowds.
Every community values different things. On HN it's insight. If your writing style or attitude obscures such insight, it will be voted the same as if there were no insight at all.
After a quick glance on the OP's comments, I don't think it's that his posts lack content or insight, but rather are expressed in a style and/or tone some find unpleasant.
"Vertical list of applications??? Microsoft what have you been smoking?"
Sounds pretty emotional. Maybe was intended somewhat humorously but humor on the internet (especially in a forum) is tough to pull off. Three question marks expresses strong emotion. Strong emotion is the opposite of critical thinking and logic. Emotion is (in part) actually a form of memory. People with strong feelings are better at making snap judgments. People who lack that have to actively work at making a decision because they don't have some "gut feeling" to go by. When you emote strongly in a public discussion, you actively promote other people not thinking and, instead, just reacting. So there are valid reasons why that is something not very welcome here.
I'm someone who tends to strongly emote and I sometimes make remarks that get downvoted in part because of that. That kind of expression has its place. But it's so socially disruptive that there is good reason to discourage it in a public discussion and even more reason to discourage it in a public discussion where the goal is critical thinking and logical exchange of ideas.
"Vertical list of applications??? Microsoft what have you been smoking?"
(As we're quoting rap lyrics today) I think that you'll be doing just fine if you relax a little.