Users flagged it, which is common on divisive topics. We sometimes turn flags off, even when a topic is divisive, but I think it's best if the underlying article is not a direct advocacy piece (or an organizational announcement*).
Here are some other places where I've posted about this in the context of this topic. If you or anyone take a look at those explanations and still have a question that isn't answered, I'd be happy to take a crack at it.
(* we tend not to favor posts that announce organizations, because while the organization may be important and its work may be interesting, the announcement posts themselves tend not to be interesting, so they end up fueling generic rather than specific discussion.)
I think you're doing a good job in turning off flags for some devisive posts. I was just surprised at how easy it is to kill the post from just a couple (?) flags especially after others have vouched for it. There was this weird behaviour going on where the post got killed then revived because some user vouched for it and then another flagged it.
It's also worthy of note that this system is ripe for abuse, because the visibility of the post is asymmetric. It gets killed as soon as it gets flagged, so no new users see it and hence hard for someone to vouch. There's also the obvious problem of ganging on a post to flag/vouch for it, which again seems like it can be easily abused by small groups.
It is if the post consistently gets vouched for whenever others stumble across it. Of course if it only got flags then it likely represents a widespread opinion.
Here are some other places where I've posted about this in the context of this topic. If you or anyone take a look at those explanations and still have a question that isn't answered, I'd be happy to take a crack at it.
https://news.ycombinator.com/item?id=39920732 (April 2024)
https://news.ycombinator.com/item?id=39435024 (Feb 2024)
https://news.ycombinator.com/item?id=38947003 (Jan 2024)
https://news.ycombinator.com/item?id=38749162 (Dec 2023)
https://news.ycombinator.com/item?id=38657527 (Dec 2023)
(* we tend not to favor posts that announce organizations, because while the organization may be important and its work may be interesting, the announcement posts themselves tend not to be interesting, so they end up fueling generic rather than specific discussion.)