We’re told what could be a false premise (like how Obi-Wan told Luke Vader betrayed and murdered his father) and that’s all we need to know for now. But if you really want to go in depth we should take this to another thread.

Now about your edit…have you found some way to remove all or most of the music? I’ve been messing around with the Rey v Kylo duel and even though I delete all audio channels (except the dialogue/sound effect channel if course) music still plays during that scene