I think it's about AIDS. Just like BoRhap...
Bohemian Rhapsody isn't about AIDS - it wasn't even heard of then! The only person who knows what Bo Rhap is about, was Freddie, and apparently Roger (who isn't letting on), but if you listen to the lyrics, the most likely conclusion, IN MY OPINION, is that it's about Freddie's struggle with his sexuality, and about the religious implications of him coming out as gay.
Have you ever heard about sarcasm...?
That's an old joke about AIDS in BoRhap on this site. Simply because every two weeks we have a thread "What's BoRhap about?" So now everywhere we claim it's about AIDS... Mind you- so is FLASH...