You should care if you're being combatative, but, even more importantly, quoting previous comments the way you're doing doesn't work well on HN and is also a flamewar trope. Everybody can read the comments you're responding to. Just refer back to them in prose. A single quote, maybe 2 in a long comment, fine, but what you're doing now creates the impression that you're sort of rebutting what the previous commenter said as you read them, sentence by sentence, which is a tell that you're not actually thinking about what they said.
Also: they're pretty clearly wrong, so you shouldn't need any of this to refute them.