Alas, we're going in circles now. That's certainly not true and a classic example of overgeneralizing from skewed data.
Can you really not understand why we'd moderate a comment like https://news.ycombinator.com/item?id=26368582 without appealing to ideology? It plainly violated the site guidelines, and the account had been breaking them aggressively (and surely on purpose) even after repeated requests to stop.
That's bog-standard moderation based simply on trying to keep the forum alive for interesting conversation, as opposed to flamewar and scorched earth. Interesting HN conversations can and do contain interesting comments with anti-imperialist ideas...but this case was obviously not that.