If he has to yell all the time, maybe you need a hearing aide.
I know people like that. Some make the stranges sci-fi movies look like a documentary. Oh wait, maybe they are. The beginning of "American Warships" stated that the DoD doesn't want you to know the story being told. Or something similar. Maybe it stated that it didn't happen which makes the theorist think it did happen and it is all false flag/red herring...