I don't have to explain anything, HN is based on the ideals of arguing in good faith and not vilifying people for their opinions. If you think they're being harsh, then say that. If you think they're wrong, then refute them. But if you're solely seeking to bash them, why even comment in the first place? How does that advance anyone's understanding of the topic, or sway anyone's belief? It's the opposite of productive conversation, if you think they're encouraging a harmful or counterproductive dialogue then you can downvote them and move on. It's not rocket science.