Why aren't you ashamed of yourself?
Namecalling ("SJWs like you") is against the hacker news guidelines. I would suggest you read them.
Also, it's worth noting that actual, self-proclaimed SJWs (I am one, I know many, and am in their communities) wouldn't have any problem with the joke in question, because it's "punching up", i.e. it is making a joke about social problems in a group that has the systemic advantage. So your name calling isn't even accurate in this case.
> Instead of focusing on the VALUE brought by the author, you managed to dig up one benign joke and went on to discredit the entire thing.
Please point out where the poster "discredit[ed] the entire thing". I don't see them discrediting the entire book, I see them questioning a bit of context around the joke, which is a perfectly valid thing to do.
> Why aren't you ashamed of yourself?
Why aren't you? The poster is asking a legitimate question around the context of a line of the book, and you're insulting them and denigrating them for this.
The argument could have been a lot clearer and less confrontational. At least it seems more consistent than anti-feminists being "reactionary" for the old times where we could make jokes about women but being offended by jokes about men.
That's awful lot to infer about someone from one sentence.
> turn it into some kind of personal war/problem/argument/discussion/hate
Picking the "discussion" part out of that, why is discussion on these topics a bad thing?
> one benign joke
Benign is subjective.
> discredit the entire thing
I think a more charitable read would not result in the implication that the question was intended to discredit the entire work.
> you actually put EFFORT in finding something
Or perhaps the parent just saw this when reading the page.
> Why aren't you ashamed of yourself?
Probably because it was just a simple question being asked.
Regardless of the argument, that's an unkind, personally-attacking tone and doesn't seem necessary to your criticism.