Re "long comments with a bunch of quotes and links", there's nothing wrong with that in principle but sometimes people arrive with pre-existing talking points and whatnot and that's not curious conversation—it feels like being recited to tediously. I'd try to avoid that. But if you're relating to what the other person is saying, remaining respectful, and not just copy-pasting, there's no reason that can't be curious conversation, and it certainly doesn't need to be flamewar.
Ok I think I made my main points after all so I might not need to come back later :)
Edit: But you can't post stuff like https://news.ycombinator.com/item?id=38849625 - that's just too aggressive, and "what part of X don't you understand" is both a swipe and a flamewar trope!
https://news.ycombinator.com/item?id=38849701 is also borderline by HN standards, I'm afraid - but would probably be ok without the last sentence. Your comments will be better (for HN) and also more persuasive if you don't use overwrought rhetoric like that.