I don't think that Boyd makes reference to Elvis and Jesus because they thought they were something they're not, I think it's because the "megalomaniac" being mentioned in the song think's he's a king such as Elvis (King of Rock and Roll) or Jesus (King of Kings). It's kind of like a srcastic question, y'know, like "Oh, you think you're king? What do you think you're Jesus or Elvis or something?" He uses these two figures because they're pretty easy allusions for most people to recognize. Everybody who would hear this song would have heard of Elvis and Jesus.
I don't think that Boyd makes reference to Elvis and Jesus because they thought they were something they're not, I think it's because the "megalomaniac" being mentioned in the song think's he's a king such as Elvis (King of Rock and Roll) or Jesus (King of Kings). It's kind of like a srcastic question, y'know, like "Oh, you think you're king? What do you think you're Jesus or Elvis or something?" He uses these two figures because they're pretty easy allusions for most people to recognize. Everybody who would hear this song would have heard of Elvis and Jesus.