Not always. A surprising number of HN commenters in those threads supported both Facebook and the genocide.
Either way, HN was anything but disinterested.
I'm skeptical that there actually were non-grey comments in support of the genocide
You won't find many threads where Islam, Muslims or immigrants are mentioned in which at least some anti-Muslim and anti-immigrant bias doesn't appear, including this one.
Edit: what did saana say that got them flagged out? Is this the one?
Yes. It's safe to say that comment had anti-muslim, anti-immigrant, anti-minority bias.
There are many people like that in the world though. It's unreasonable to require them to not exist before we discuss topics like this. In fact, in a very real way, they are the entire reason we find ourselves needing to discuss topics like this.