I don't see it as flamewar style, it was stating a fact, in response to the parent comment but ok maybe it would have been better if I have added broader explanation of the opinion along the fact. Or refrain from commenting on touchy subjects.

"Try to be a bit more self reflective" is definitely crossing into personal attack and not ok on HN. If you had stuck to facts and made your substantive point respectfully, that would have been fine.