Wagner is dead.
Hitler is dead.
I like Wagner, I like Israel and I hate Hitler.
It’s only music, make up your own back story if you wish.
Considering that Wagner died before Hitler was born, it would seem odd to “ban” Wagner’s music because another generation’s nefarious characters liked it.
If the Israelis want an unofficial ban on Wagner because Wagner was an anti-semite himself, I have no problem with that.