Having a HN thread about an article does not imply endorsement of everything, or even anything, on the site.
In my experience, it's a mistake to make reliability judgements about major sources (such as news organizations) at site scope. To pick an unrelated example, we often get criticisms when HN has a thread about a Daily Mail link, but occasionally a good (for HN) article does appear there; and of course many bad (for HN) articles appear there too. If you don't like that example, substitute any other major source—they all have a mixture of good and bad articles, good and bad information. It's therefore important to make finer-grained distinctions about these things—e.g. article scope rather than site scope.
This is one of those cases where it's super helpful to have a single principle that one is optimizing for: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor... – the moderation strategy I just outlined is derived from it.