The 'BECAUSE' phenomenon

In his 2012 book Subliminal: How Your Unconscious Mind Rules Your BehaviorLeonard Mlodinow recounts an experiment based on the memory theories of Frederik Bartlett (1886-1969) and based on the original study by Ellen Langer (1978)

The experiment is carried out in a public library, in the copying machine sector. Every time a visitor would head to the copying machine, an experimenter would rush and attempt to queue-jump them by saying: “Excuse me, I’ve got five pages, can I use the copier?” Not surprisingly, since this statement does not provide any justification for the demand, 40% of those approached turned down the request.

Next, the experimenter modified the line, and instead said: “Excuse me, I’ve got five pages, can I use the copier, because I am in a hurry?”  The change led to to dramatic drop in the turn-down ratio – now only 6% refused the request.

A further modification was made. Instead of providing a plausible reason — being in a hurry — they wanted to see whether the reason itself played a role in the processing of the request. So they used the phrase: “Excuse me, I’ve got five pages, can I use the copier, because I need to make photocopies?” Amazingly, this resulted in 7% rejections ratio — practically the same as with a plausible reason.

Excuse me, I’ve got five pages, can I use the copier? no reason provided 40%
Excuse me, I’ve got five pages, can I use the copier, because I am in a hurry? because I am in a hurry 6%
Excuse me, I’ve got five pages, can I use the copier, because I need to make photocopies? because I need to make photocopies 7%

The conclusion was that our brains rush to process the verbal request and once they hear the because clause, they automatically decide that since the phrasing includes a word denoting reason, then there must be a real reason, so they fall short of judging the reason itself. The brain seems to recognise a familiar language pattern and uses its own predictive function when reacting to the situation.

Resorting to the use of pre-loaded cognitive scripts — the purpose of such scripts would be to automate responses in social interaction — gives the brain the chance to focus on other, more important things.

because (conj.)
late 14c., from phrase bi cause, introducing a subordinate clause or phrase, "by cause, for the reason that," from by (prep.) + cause (n.). Modeled on French par cause.

Source: Online Etymology Dictionary

How it relates to disinformation?

In the context of disinformation, because can be employed to create the illusion of a valid reason or justification, even when the information presented is misleading, fabricated, or lacks credible evidence. This can make disinformation more persuasive and effective in spreading false narratives or manipulating public opinion.

Because, whether the reason is actual or implied, can strengthen an argument, help convince people of an idea, and, perhaps most importantly, bypass critical reasoning. The danger lies in that a reason can be entirely fabricated ("The Government wants to push forward with this legislation because they want to control our lives and take away our freedoms") and the whole language structure (because + reason) can be used to fit a disinformation narrative. If used in this way, it strengthens the narrative and can steer the conversation away from the original issue (the actual legislation being proposed) and into the greater "government control" conspiracy discourse. The language structure can also be used to evoke reasons that trigger an emotional response, further limiting and degrading critical thinking.