This is a core tenet of Moldbuggian neoreaction, that American and European politics are run by a "Cathedral" that adheres to communist beliefs. Claiming that mainstream political positions are communism is absolutely insane.
It wasn't overtly racist or filled with profanity; perhaps some people just wanted to silence it.
The post in question was downweighted by user flags. The only thing we did was unkill it so an ongoing discussion (such as it was) could continue, which is standard practice.
I don't have any objections to the way HN works, just surprised so many users see this topic as flag-worthy relative to those seeing it as an interesting discussion.
EDIT: Nevermind. I see this is back on the front page.
The current post was penalized by the flamewar detector, but we've canceled the penalty because the community clearly wants to talk about this, and what you posted is as close to a canonical source as we're likely to get.