The issue isn't that the commenter was flaming a particular person but that the comment was going into a generic ideological tangent. That's a classic flamewar zone and off topic here. I'm sorry to tell you that it's off topic since you find it interesting, but we don't have much choice but to build firewalls around HN. Highly-charged political topics would take over very quickly otherwise; they are more impassioned and inflammatory (and important, arguably) than anything else that gets discussed here.

By the way, I'm sorry that I didn't have a chance to respond to you in earlier threads. I saw your comments and would normally have been happy to answer, but ran out of time.

We ask people not to do generic ideological discussion because it's boring and not what HN is for. A good example is https://news.ycombinator.com/item?id=19987774. We don't need that here—it has all been repeated millions of times, is all predictable, and therefore is all off topic. We do eventually ban users who keep doing that on HN, so please stop.

Shadowban means banning someone without telling them. When we banned you before, we told you at https://news.ycombinator.com/item?id=10883352 and discussed with you later over email.