I don't think I saw the parent comment; it's about as bad as yours was, though yours might have been a notch worse, since that one was attacking in the third person while you did it in the second.

The main thing to realize is that even if another comment is bad/uncivil, you still need to refrain from replying in kind. Believe me, I understand how hard that is! But our community depends on it.

Sometimes I think that HN threads are a big experiment in all of us learning how not to get triggered. If you give better than you "get" (by reading someone's comment), you'll be on the right track.