why does everyone pick on wagner

Why does everyone pick on Wagner? We just watched a movie that included a depiction of cultural life in Germany in the forties. Sure enough, the concert they went to was a Wagner concert. Not that Hitler didn't enjoy Wagner: just that he enjoyed other stuff more, and considered it more in the spirit of his Germany. Strauss, for instance. Hitler's favorite opera was "Die Fledermaus." When do you ever hear about that, or hear people qualifying their enjoyment of Strauss with some "acknowledgement" of the Nazis' love for him?

More importantly, why do we bring all that stuff in in the first place? Wagner had exactly as much to do with the Nazis as he did with Elmer Fudd.