MAGAts like the hagiographic versions of history, like Hollywood gave us with those fawning films that airbrushed our historical figures and events. By the time those films from the 30s and 40s made it on to TV in the 50s I thought 'cool, we're the good guys'. After the JFK assassination shit got real both in films and in life.
A hagiography is a type of biography that puts the subject in a very flattering light. Hagiographies are often about saints.
The two halves of hagiography refer to holiness and writing, and it is something written about holy people. Originally, a hagiography was a biography of a saint written without skepticism or criticism. A hagiography idealizes the subject and puts them on a pedestal. These days, a hagiography is not necessarily written about a saint, but it still idolizes the subject. A hagiography makes the subject seem like a hero, or at least a wonderful, nearly perfect person.