This is a particular problem when you realize that most of the fiction that is made into visible form (most of the written too) and that we see over the course of our lives, including when too young to question it, is made by one particular politico/ideological/philosophical side. What’s more, that side tends to — if anything — consume more fiction than the rest of us, being totally steeped in the narrative arts. (Yeah, okay, guilty as charged, and besides, I have kept a toe in reality by having kids, etc.) And they tend to have startlingly similar backgrounds and life experiences: same colleges, same type of degrees, usually unmarried and childless, though sometimes one of or the other, usually living in urban environments, usually from fairly affluent backgrounds/educated families, etc.
In a way, they are what the regency “ton” or the upper ten thousand was. They are, in fact, an isolated, tight knit village. This is how it’s so easy to blacklist or cancel someone. All it takes is a game of whisper from person to person, and suddenly you find yourself on the outs, which is very much how a village functions. It is also a way to enforce ideological conformity. If everyone you know thinks one thing, then of course, it must be so. Having grown up in a village, by the way, this could mean all your neighbors could be convinced that Spain was in raging civil war, when it was no such thing, because someone misinterpreted something, and it propagated. And then if you tried to pour water on it because you’d been to Spain recently, or knew people there, the first reaction would be to shut you out, because “you think you know more than we do.”
The problem with this is that they are serving up their internal delusion to the rest of the country and to an extent the world. (Witness European leaders reproaching us for our restrictive abortion laws which are in fact more permissive than any of theirs. They get their information from our media, and their idea of what anti-abortion people in the US are like from our media AND entertainment. And it never occurs to them this vision has absolutely no contact with reality.)