HN is not just a discussion board, it also serves as a place to get caught up on the latest happenings around the world. Hence hacker news. Flagging a news article for removal just because the readers have no civility is untoward.

If anything, it is the community and moderation teams responsibility to ensure toxic comments are downvoted or removed.

If you decide to never allow anything “controversial” on HN, it is an easy backdoor for bad actors to get articles they don’t like flagged. All they have to do is make comments inciting controversy or astroturf the comments from both sides.