Funny STAR WARS Animated Short - Why is Anakin a Force Ghost!?

I was just having a conversation with my brother last week about Darth Vader, a.k.a. Anakin Skywalker, getting to be a "force ghost" at the end of Return of the Jedi. That guy was freakin' evil bastard! He killed kids and millions of people on a planet he destroyed, tortured his daughter, cut off his son's hand, and killed Obi Wan Kenobi! I don't understand how all was forgiven by just killing off the Emperor and saving Luke. Luke doesn't understand it either in this funny short film brought to us by Dorkly, and he won't forgive him for all the terrible crap that he's done.