Stop what? Pointing out the reality of rampant anti-Chinese sentiment on HN?

Even with:

> We moderate HN to mitigate the worst aspects of this, but there's no hope of eliminating it. HN is controlled by its community. All that moderation can do is adjust the margins.

it's still rampant. You mitigate the worst aspect of it but you're still left with a anti-Chinese circle jerk.