I'm the author. You posted this comment 3 hours ago, before I deleted any comments.
I've since deleted 3 or 4 of the worst ones, but left up ones that disagree without being overtly abusive.
The comments which disagree with the author are patently abusive. I'm not entirely sure what your point here is supposed to be.
I see at least two comments that are critical of the author. And even if they were posted after you wrote this, how do you know he has deleted anything at all?
Give it an hour.
Two hours later, they're still up. Time to admit you're wrong.
Because it's a very divisive issue. Obviously I cannot guarantee that he had posts submitted that are critical of him but I would be very surprised that a fairly high-profile post (high enough to be featured on HN) had anything but nearly universal acclaim, given how it tends to polarize crowds.