Rude: yes

Value Added: no

It was rude, and I probably shouldn't have posted it on HN. It was intended to point out something though, and that was to call out the parent post.

In my opinion, at least, stating something and then adding "I am right!" is rude and disrespectful. It's implying that anybody that disagrees with you is not just wrong, but wrong to the degree that you cannot even allow for the possibility that you are mistaken, or that conversation is pointless. That's why I was rude back.