Of course it's usually not just one commenter contributing to these downslides, and the GP arguably started it, but your comment was noticeably more flamey than the GP. That is exactly the wrong direction to respond. Instead, what you should do in response to a provocatively wrong comment (or one that you feel is wrong) is either (1) correct it respectfully and patiently; or (2) chalk it up to the internet being wrong and just not respond.

If you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd be grateful.