Earlier quoted context omitted.
Flagging posts that would not fit on HN or would just cause pointless flamewars is acceptable. Given the state of this thread, I think it's even more justified. "Users [flag] post as breaking the guidelines or otherwise not belonging on HN." https://news.ycombinator.com/newsfaq.html
I've seen far more inflammatory commentary/criticism in the tech community over the years. This post is honestly pretty mild if you look at it objectively. The fact that a small subset of the Go community is triggered by this post and can't behave in a civil manner isn't a reason to flag it.
Honestly I just hope @dang nukes this thread from orbit, and maybe it'll be posted again and get a cooler reaction from everybody.