I don't like seeing argumentative posts
More importantly (to me anyway), I don't like banning things just because I don't like them.
That's why I suggested walling them off and requiring an opt-in.
But you see, that's not the full list of reasons. There are lots of things I don't like for myself that I support for others; marriage, having kids, religion, eating durian, shiatsu massage at 5a, and spending time in large crowds.
The trouble here is not just that someone doesn't like certain speech, it's that these arguments have a cost to this forum and its members.
They cost money for bandwidth, money better spent on keeping up the site in more productive ways. People can argue on Reddit all day long if they choose, but that doesn't need to be here. Quora is another good place to argue, but their mods are censor-happy.
It's speech that we don't like that we must protect in the U.S., but this forum is not a Free-Speech zone. It's a forum paid-for and hosted by a small group of people who have skin (and money) in the game, and this forum is more like their home. It's not incumbent upon them to host political (or other) squabbles which can devolve into full-on rages.
Classifieds and general camaraderie; do we really want to have ongoing arguments (and there will be arguments) that sow division? I don't think it's good for the forum. You may be ultra stoic (as am I) but not everyone else is. I'm an artist, and I cannot tell you how many times other artists freaked out when correcting or commenting on something that was objectively and demonstrably wrong. Not everyone handles disagreement well.
Really, this question about hosting political debates (and arguments) is about cost/benefit as it affects the forum and users as a whole. Some of us don't want politics (especially divisive politics) mixed in with gun discussion. Sure, laws affecting gun ownership I suppose are fair game, and it's easier to be stoic when discussing these topics from an evidence-based perspective only.