first of all, Edmund Burke, a distant relative of mine said that quote about good men doing nothing for evil to triumph.
Second of all, the Jedi are clearly a form of the samurai. I would not be surprised if there was a tale very similar to this story about a samurai's exile, and return for vengeance/to make piece.
It is also quite possible that this story came from someone who has a very good imagination. Either way, it was worth the money for 29 hours of my time