It is not a opinion article about the current admin. It is the direct statement from the state department on a topic that doesn’t belong less here than many other general interest topics found on hacker news. A few post below, there is a petition against pesticides in France.
UNESCO stands for international cooperation in education, science, culture, and communication. That seems well within what HN can cover in my opinion.
People also like to eat McDonalds and drink hyper-sugary soda, that doesn't mean those are good for you and should be served at every venue (yes, I know Trump likes McDonalds, please don't bring it up here if you can). There should be places where people at least try to do better. Usually HN tries to be that place. Unfortunately, in topics like this one it is not raising up to the mission. A long discussion of "why people that disagree with me are so stupid and evil" is not why I come to HN. There's enough places where you can get that and then some.
People seem to want to see it here and comment about it.
Personally I am happy to see it discussed here. I have seen interesting comments tempering and contextualizing the headline that I appreciate.
There are still a vast majority of articles on other topics. Those ones are easy to ignore if they bother someone.