stan

A person who is obsessively fanatical about a media property/celebrity, who blindly consumes everything they produce and will ignore any logical fault in the object of their obsessive fandom, to the extent of becoming triggered by even polite criticism and branding critics as all manner of extreme insults.

Person 1: "Disney's Star Wars trilogy lost over a billion dollars over three movies."
Stan: "You're racist, sexist and toxic! Star Wars is cool! *makes lightsaber noises*"