You turned this thread into a black vs. Asian flamewar. That's seriously not cool. Whether it was your intent or not, the effects were trollish. We've had to warn you many times in the past about this kind of thing. If you keep doing it, we will ban you. Please stop now, and don't do any more of this on HN.
Users flagged one of your comments and then you deleted it. Moderators didn't touch it or even see it.
Since you have a long history of flouting the site guidelines here, using multiple accounts, I'd guess that it was flagged because it broke the guidelines.
https://news.ycombinator.com/newsguidelines.html
I've detached this subthread from https://news.ycombinator.com/item?id=22975063. Hijacking the top comment was also not cool.