I have no issue with reasonable arguments either, but what about when it's the same 2 posters, point-for-pointing for 3 or 4 pages, each post getting longer and longer?
And you're right, the "nope" reply, for me, is the other extreme.
I’m not sure what thread(s) you’re referring to, so I may not be reacting to the same thing. (Which is why this sort of anonymized discussion is so unhelpful.) But, in general, I tend to have a pretty broad tolerance for discussion, whether I like the slant or not. It is, after all, a discussion forum.
From my perspective, if people are deliberately ruining theads, that’s an issue for the mods. Everyone else should just talk about Star Trek. Adding tons of sniping and jabs about what the “other side” thinks only worsens the user experience.