1) The blog post of yours which attracted such vitriol was entitled "Never Hire Job Hoppers. Never. They Make Terrible Employees"; you aren't using a conciliatory tone and it seems unfair to expect one in response.
2) Practically all the comments I read on here are more civil than I see elsewhere on the web.
3) In pw0ncakes original post there were a lot of measured statements (for instance Job hopping is almost always involuntary-- not in the sense of a person getting fired, but in the sense of a person being wise enough to realize that he's in a position that his wasting his time, and moving on-- the rational response.) which you appear to have disregarded.
4) Most of the vitriolic posts I've seen on HN have already been modded down into oblivion.
5) Although purely anecdotal I notice the civil air here and censor myself accordingly (in real life I tend far more towards "sarcastic douche" than I do here).