BLUF:[Yournews.com] When people are invested in a delusion, they begin to zealously defend it.
Here’s how human neurology works: Once people are invested in a delusion, they become zealots in their defense of it. For example, a person who is heavily invested in Bitcoin often becomes utterly unable to hear any information critical of cryptocurrency. This is exactly the same way a person who took a covid vaccine can no longer tolerate information showing those vaccines to be dangerous (or even deadly).
Once a person is so fully invested in a delusion that they cut off their consciousness from the real world around them, they become "cultists" who drown in their own dogma. At some point, a "day of reckoning" arrives that shatters their delusions, leading to a traumatic psychological breakdown that’s often described in phrases like, "my whole world just got shattered."