There needs to be a way to stop deliberate attempts to cause trouble.
This x1000.
This is the core of the problem. People are permitted to start toxic conversations that pit community members against each other, divide the community and generally stir the chit.
But nothing obligates you (or anyone else) to
respond to those threads. The person posting is trying to generate negative responses, cause dissension, and bask in the warm glow of the interwebs burning.
When you take the bait and respond to a thread like this, the trolls have already won.
It's far better for everyone if folks ignore those threads and report them to the mods so that they can take action. A troll that doesn't get attention will quickly go somewhere else. The more attention, argument and "discussion" a thread like this generates, the more likely that action is to continue.
That requires a massive amount of will and foresight, because most of the time the beginning of these types of problems comes in the form of a direct response - often quoting - to something you post. And it's not immediately obvious (especially not to other readers) that the person is trolling, rather than say, for example simply confused or misunderstanding something. You can't ignore every post that disagrees with you, otherwise this forum dies a different death. (This is exacerbated when the person is brand new to the site, because you have 0 relationship with them, and don't for example, recognize their posting style - e.g.: some people are just grumpy/flippant/sarcastic/etc..., but you learn to deal with it after the've been around, because they aren't actually nasty or toxic).
I've seen it take pages before the person getting trolled realizes that it's going on. But once they know, it's again extremely hard for that poster to not go vigilante. See the thing is, it doesn't matter if the posts get deleted, because the damage is already done, they are angry, and often want to get internet revenge - whatever that is...
On the other hand, and this is a serious challenge for the mods involved, how do you parse the two. I have argued with other people on this site before.
I've been involved in raging arguments in fact, but in many of those discussions, neither side was trolling. We were disagreeing, and there is nothing wrong with that, nothing at all, IMHO. (btw, that sometimes leads to further problems between the two parties, and again this is tough on the mods to resolve, because it can sometimes escalate - I can name examples of this, but I suspect not without violating the CoC).
Where I draw the line, is when the trolling party then goes and starts spamming every thread, or starts arguing on multiple topics with multiple people, just for the sake of starting problems.