Just now listening to Mahler's 5th Symphony, and discovered the Siegried leitmotif cleverly quoted by Mahler (about 3 times in quick succession halfway through), a devoted admirer of Wagner, in the Final Movement. Gorgeous piece, and interesting as well that Mahler was Jewish. Of course, James Levine and Daniel Barenboim are too, and conduct Wagner, although performance of Wagner in Israel is prohibited. Lots of Heidegger's biggest champions have been and continue to be Jewish, as Rubi will know. Have been continuing to listen through this comment, and it's quoted again by cellos toward the end.