Das Judenthum in der Musik
"Das Judenthum in der Musik" (German for Judaism in Music, but perhaps more accurately understood in contemporary language as Jewishness in Music), is an essay by composer Richard Wagner which criticizes the influence of Jews and their "essence" on European art music, arguing that they have not contributed to its development but have rather commodified and degraded it. It alleges that Jews infiltrated the music industry not through their artistic capabilities, but because of their control over financial resources.
Source: Wikipedia — Das Judenthum in der Musik (CC BY-SA 4.0)