Yeah, that's a good point. I think there are largely 4 groups of people online who post this sort of stuff - those that are just too ignorant to understand the basics of how anything works, those that don't believe any of it but keep up the pretence whilst grifting, those that are similar but just trolling, and then a 4th group that have decided to treat politics (and wider issues such as culture wars) as some sort of sporting contest where they have to post stuff in support of their team in search of some hypothetical internet win (similar to trolls, but they do sort of believe what they post). Many of them might love to climb down, but they're too engaged now to give up.
After the first group, it must be exhausting to be a member of the other three, as they have to keep twisting narratives to fit the emerging facts. This goes double for the last group who may well come from an area of belief in the cause and have to keep 'doublethinking' their way through as more chinks in their worldview get exposed.
I tend to take the initial view with the sort of pro-Trump poster that they're just ignorant and need their hand holding whilst basic concepts are explained to them. When they reveal themselves to be any of the other types, it's safe to stop engaging as they're not ever going to discuss anything in good faith. They just want to spam you with anything pro-Trump, pro-Brexit, pro-Boris, pro-Putin, on and on. It doesn't really matter why, at this point it's all they have and they won't be listening to any replies.
