Thing is, it's difficult to spot from the inside when those kind of perceived groupings appear. Most of the people posting regularly in this thread have been following closely for a couple of years now, when Donald Trump's candidacy was a running joke that would soon be heading off a cliff. As with anything on the Caf, running jokes will tend to establish themselves and die hard, and being as it is a forum when people can get wound up over football, it's to be expected that the politics of the most powerful country on the planet attracts strong opinions. We'd dearly like to start taking Trump completely seriously and ease off the cheap jokes, but he hasn't actually changed at all in character or opinion from that absurdity that launched his candidacy with racist lies nearly two years ago. Sometimes to deal with such abhorrence you need the laughs now and then.
It's a shame if it does appear hard to get involved for people that don't post as much, I really doubt it's the intention of any regular poster here, many of whom basically just follow this stuff more closely than other people that they know do, and the CE of the Caf has tons of knowledgeable posters that you know can add stuff of interest so it becomes a go-to place to talk about it. I know there can tend to be the odd dog-pile when unfamiliar opinions occur, but bear in mind that in the case of two Trump supporters who faced that treatment, one turned out to be a pretty nasty white supremacist, and the other was either a conspiracy nut or a troll. From my experience, when someone posts interesting stuff in good faith then it'll be engaged with properly, regardless of how often that person is involved.
At any rate, I know I can tend towards dickishness when I'm really into a discussion so always feel free to tell me I'm doing so and I'll try to self-correct