Blimey. It's good to know that if they "intermingle and intermarry", this dreadful Jewish trait can be "watered down".
But in any event, Wagner didn't write "I do wish the Jews would integrate more", but "No matter how well they integrate, they think Jewish thoughts and cannot imbibe as native the culture in which they find themselves".
You're saying that Mahler would have disagreed with Wagner on this, since he (Mahler) didn't think Jewishly any longer after having been assimilated for so long. But Wagner would have said, 'you're fooling yourself Gustav. No matter how much you assimilate, you will never be part of this culture'.
OK, bloody hell! A balding head is now a Jewish physical trait?!
I don't have a lot to say in regard to that, other than that you're expressing things which are just as disgusting in their stupid levelling of individual traits into "jewish" and "non-jewish" as Wagner perpetrated in the first place. Only you don't have the glorious works of music genius to excuse yourself with.
You are now equating antisemitism with racism. Whilst anti-semitism can be regarded as a form of racisim, it's not equivalent to it, and the stating of equivalence is to diminish the peculiarly nasty aspects of anti-semitism.
I don't agree with your premise, and therefore not with your conclusion.