1. The term "Conspiracy Theory" was created by the CIA to discredit anyone who didn't buy into the official JFK assassination (or was it?
https://apnews.com/article/fact-check-conspiracy-theory-jfk-941578119864). Whatever it's origin, the term is used in a smugly disparaging way to confirm the boundaries of right-thinking and "wrongthink" or more accurately "crimethink". It's all very orwellian. Accuse someone of being a "Conspiracy Theoriest" and you have immediately destroyed their argument, without actually addressing any of their arguments.
2. The desire to conform is strong in many people, and especially strong in British culture. Us and Them is a very important way of understanding who you are and where you might fit in to society, and having swivel-eyed loons and gammons trying to tell you that black is white and up is down is, frankly, unsettling. Especially when you know, for a proven fact, that they are deranged imbeciles, which rather presupposes that the facts your certain knowledge is based on are valid and truthful facts. This brings me on to the next point:
3. Narrative control. (See point 1 above, also). There are numerous groups who want to keep you believing in certain things, and not believing in certain other things. You can tell it's a narrative by the endless, redundant repetition. I am sure we can all come up with examples, but just a couple for ironic effect: "illegal and unprovoked invasion", and "the right to defend itself". I'm sure you know who these two are applied to, but just for fun try swapping the names of the countries, and see what happens...
Governments spend a lot of time and effort getting you to belive a narrative, rather than facts. Entertainingly, there are so many different groups vying for control of the narrative that they now make up the bulk of the comments on many fora (I prefer "forums", but we need to pretend to speak Latin to show our off edumication - status again). The half dozen "real" posters get swamped by all the crazy. Flat-earthers tend to turn up wherever there is anything controversial to sidetrack the conversation. Global warming is another favourite. Vitriolic antisemitism is often used by the worldwide Jewish Internet mind control network (Hasbara, anyone?) to rapidly stop any sensible debate. It will be interesting to see who's cages I rattle here.
A resent trend in journalism is to stop reporting facts, and create "stories" tha make you feel. It doesn't really matter what emotion the stoŕy conjures up, as long as you do lots of emotion rather than logic. The BBC website has devolved into an irrelevance of touchy-feely reporting that is heavy on things to make you emotional, but little if anything factual to let you know what is actually going on. Apparently you are more likely to click on a link if you are angry, so the majority of news reports are designed to make you angry, for clicks. Try not reading any news for a week, and see if your mental state improves.
That's quite enough for one post - I stopped posting here a couple of years ago, mainly because I couldn't cope with the enforced group think, jingoism and racism that is built into british society and extremely visible here. Apologies if that includes you, but take comfort in the knowledge that it's not your fault - you are a product of your society. I used to be, but 25 years of living abroad has given me a certain distance with which to view things. I don't know if I will reply again, (I am mentally much better off for not being involved in sharpening squabbles), but have at it. Debate is the search for knowledge, is it not?