Users flagged your sibling comment, no doubt because it was unsubstantive and arguably flamebait. That's against several of the site guidelines; this one, for example:
"Comments should get more thoughtful and substantive, not less, as a topic gets more divisive."
An user asked me "You know this will cause more emigration right?" How is an affirmative answer supposed to be flamebait or unsubstantive? I would definitely love to hear those arguments.
How could it not be? More labour for the rest of us. Economically the benefits of immigration are unquestionable, despite scaremongering by the Western right.
"Comments should get more thoughtful and substantive, not less, as a topic gets more divisive."
https://news.ycombinator.com/newsguidelines.html