GP and you really don't know anything about Wagner beyond what you've seen on TV documentaries about the Nazis, do you?
Wagner himself may have held some horrible views, but the work that he produced was not geared toward racism, classism, or religious bigotry. His fascination with Norse Mythology was not based on an attempt to tie it to Prussian and later German history, rather to turn an epic tale into an opera and into profit for himself.
It's not Wagner's fault that fifty years after his death, Germany reappropriated his music, attempting to tie Norse Mythology, their concept of what a perfect human was (in the form of Scandinavian coloring) and finding a fit with his personal views (which I've already acknowledged were horrible) to attempt to redefine the music. Wagner never explicitly defined Jewish characters as foils or villains; one can argue that Shakespeare, in his body of work, was worse to the Jews through his character Shylock the Moneylender as being out for literal flesh when his borrower defaults.
Do you advocate banning Shakespeare for the same reasoning?
I tend to think of Wagner and his attitudes and personal history in a similar context to Al Jolson. Jolson's biggest hit was Swanee, demonstrably highly racist in that it was not only in Blackface, but pined for a fictional, idealized South that was kind to slaves that never existed. As such, some of Jolson's body of work doesn't appeal to me, but I can acknowledge the man's faults, choose to avoid those works that I don't agree with, and can enjoy what I don't find unpalatable. I can even acknowledge that given the history and legacy of the Minstrel Show, it's not surprising that at the end of the Blackface era, there was still acceptance of the style and that its commercial viability basically ensured that it wasn't going to go away quickly, and that Jolson and many other performers employed it because they were brought up finding it acceptable. I don't find it acceptable, so I don't embrace those elements of the performers' bodies of work.
It's possible to separate the man from the work.