Muchenergyhasbeendevotedtomakinge.g.RichardWagnerappearasalmostthemostunsympatheticpersoneverknowntohistoryaswellassettinghimupasbeingresponsibleforHitler'sexterminationoftheJewsduringWorldWarII.OncewebecomeabletoseeandhearwhatisreallygoingoninWagner'sworks,weunderstandwhyithasbeencruciallyimportantforsomeonetomanipulatethetruthbehindtheactuallifeandpersonalityofthecomposer.

Please segment the words:
Much energy has been devoted to making e.g. Richard Wagner appear as almost the most unsympathetic person ever known to history as well as setting him up as being responsible for Hitler's extermination of the Jews during World War II. Once we become able to see and hear what is really going on in Wagner's works, we understand why it has been crucially important for someone to manipulate the truth behind the actual life and personality of the composer.