“Sometimes people hold a core belief that is very strong. When they are presented with evidence that works against that belief, the new evidence cannot be accepted. It would create a feeling that is extremely uncomfortable, called cognitive dissonance. And because it is so important to protect the core belief, they will rationalize, ignore and even deny anything that doesn’t fit in with the core belief.” — Franz Fanon
Politics and religion, because they effect the ego’s survival impulses, are the most pronounced areas of focus where cognitive dissonance comes into play.
How else does the Donald still have supporters?
Apprentice Killers: The War of Lincoln and Davis — a good book.