Because HN is choke-full of racists, xenophobes, inveterate nativists, and white nationalists — and nobody here seems to want to acknowledge this “uncomfortable” truth.
It’s dark and dreary, but that’s the sort of shitty people who are unfortunately ta majority of users here.
The comment was unsubstantive flamebait and was correctly downvoted based on the site guidelines. Please stop posting this way to HN—it's not what this site is for.
Edit: comments like https://news.ycombinator.com/item?id=26437161 are obviously not ok, either, and will get you banned here regardless of how right you are or feel you are. We've had to warn you about this before. No more of this please.
