I empathize with your concern about the tone. Without trying to dispute your feelings (which are yours and I respect that), I'd just like to point out some considerations that may or may not make any particular comment an exception to the rule:
1. There is a difference between being uncivil to a fellow HNer in a comment thread and being uncivil to a third party that is the subject of a post.
2. There is a difference between kicking a dog when it is down and kicking a giant that topples.
2. I don't really mind poking fun at projects, but poking fun at people, especially when they're probably feeling shitty about things, in a place that they're likely to read it, just seems nasty to me and exactly the sort of thing that doesn't belong on HN.
The account you link to was created 21 days ago and has 3 karma. Granted, anyone can read without needing an account but it doesn't really lend weight to what (I think) you're trying to point out.
Also, the post you've taken issue with is simply a parody (or satire). There very little in there that seems like a personal attack (at least to me).
1. There's no indication that account belongs to the Bill Nguyen in question. Nguyen in one of the most common surnames in the world, and Bill is an exceedingly common first name.
1. There is a difference between being uncivil to a fellow HNer in a comment thread and being uncivil to a third party that is the subject of a post.
2. There is a difference between kicking a dog when it is down and kicking a giant that topples.