"Delusion and denial
Narcissists can’t deal with reality because it contradicts what they want to be true, and this creates painful emotions. As a coping mechanism, they learn to delude themselves that what is real is actually not real, and however they see the situation is real, even though it isn’t.
Sometimes they truly see it that way. Other times it’s just a story they tell themselves and others. And often the longer you tell a story, the more you believe it, even if initially you know it’s not true. And so eventually they may start truly believing it."
Do you mean kind of like believing Russians rigged an election because the same people who just got caught and admitted to faking being Russians to rig an election told you so?
Go right ahead and keep telling yourself and others that story bro

