I'm afraid you crossed into breaking the site guidelines with this comment. Could you please review
https://news.ycombinator.com/newsguidelines.html and take the intended spirit more to heart? Note these ones:
"Have curious conversation; don't cross-examine."
"Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith."
"Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something."
Edit: at the risk of going offtopic, perhaps it would be helpful to explain in a bit more detail:
When you post "just don't bleach your skin, was it hard to understand", that's not only a shallow dismissal, it indicates that you haven't taken the time to read the thread, where they've talked multiple times about the skin conditions their product treats (I know literally nothing about this, except that I did read the thread).
Second, what you posted about 'people of color' definitely felt like cross-examination to me, i.e. hostile questioning designed to 'gotcha' rather than curious conversation. "People of color", for better or worse (it's a rather stilted phrase) is the term that 'polite society' has settled on for the time being—in other words, it's used by millions if not hundreds of millions of people. It's not as if these founders invented it, and challenging them about whether the phrase has any meaning points the thread into a social-controversy flamewar, which is off topic in the context of a startup launch.
Actually, when I re-read your comment, the last sentence doesn't seem hostile if I ignore the previous sentences. If you had stuck to that and maybe added a bit of neutral context to explain why you were asking, it would have been fine - and fortunately nphatak has already give you an informative answer.