It isn't just recent. For example, https://news.ycombinator.com/item?id=25549202 is the sort of ideological blast we don't want here, regardless of which way you point. Earlier too: e.g. https://news.ycombinator.com/item?id=24961547. When accounts build up a pattern of abusing HN like that, we ban them.

"Pointing out unpopular opinions and statements of fact" and "banning me for attacking sacred cows" are what every troll says (right or left). Even if that were a fair description of snarky flaming, which it isn't, you don't need to break the site guidelines to do those things. That's the issue here. Most commenters manage to stay within the guidelines, so it's not hard if you choose to.

https://news.ycombinator.com/newsguidelines.html