You can call it censorship or not, but it's not a good look either way.
No, you're interpreting things here in a specific way.
It could be that users didn't think it belonged on HN because it was politics, which is often frowned upon. It could be that they thought there was a problem with the article itself.
In any case, even if it was totally the community choosing to not want to see this news (which I doubt), it wasn't a deliberate action by the people running the site, which does make a difference (otherwise that would've been the original accusation).
However, I think you are making a distinction without a real difference. The company that hosts this forum set it up with an incentive structure that results in the behavioral outcomes we see on this forum. If these incentives lead to newsworthy posts concerning the CEO of the company that runs these forums getting flagged, perhaps the incentives need to be changed.
I think the only thing I'm trying to push back on is any kind of "conspiracy" thinking - this might not be anything coordinated, definitely not by HN staff, nor by HN "elite" users or anything like that.
It's a different flavor of Reddit's "downvote for disagreement" status quo. The rules might say one thing, but the behavior of users says another.