I do not agree on that. I think if you flip the perspective in topics like this to the other political side ("Chicago is finally doing something against illegal foreigners in the city") it would not be any less likely to get flagged.
If I had to give a "best gess" for the aggregate political bias of HN, it would still be democrat/liberal/left, albeit less so than say, Reddit.
> You can say some pretty horrendous things on here
"Couching statements in soft language" is a significant part of keeping a polarizing discussion civil in my view, so that makes sense to me. What are those "horrendous things", and what would you like the moderators to do?