Thank you for calling this out in detail. I think that copy pasting responses several times easily qualifies as trolling and the massive amount of them doing this makes it no question. This alone should be enough.
They should be banned from the instance. I can't quite follow how it's controversial unless some of the mods are letting their politics stand in the way of observations anyone can easily make in a couple of minutes. There is nothing redeeming about this account. They are spreading bad ideas in bad faith, and frankly it shakes my faith in the platform that they can get away with it Scot fucking free. It's disgusting.
The problem we have is not with bad opinions.
If I were to copy paste the same response across many threads, intentionally antagonizing users and making that obvious, what is the secret to having that not be considered trolling? Because apparently op somehow discovered how to achieve that. This user is making it beyond obvious. They intend to troll users, and they're putting a lot of effort into it. Can you help us understand what makes that okay?