Belief causes people to act against their best interests, to waste their money, to accept unproven nonsense as fact, to delude themselves and push that delusion on others, to hurt and kill others, to resist reality, etc.
They are not embarrassed to believe the most evident lies and myths.
"Apparently, there is no conspiracy theory too wild for some QAnon followers."
"Case in point: Members of a QAnon group based in Dallas have floated the theory that John F. Kennedy is not only alive, but disguised himself as former President Donald Trump over the weekend to attend a rally in Florence, Arizona."
"As evidence, the group’s leader, Michael Protzman, claims Trump appeared to be shorter than he should have been, Vice News reported."
"'You could tell it wasn’t Trump,' Protzman said in a live chat excerpted below, referring to a moment where the former president invited Arizona gubernatorial candidate Kari Lake to the stage."