most of the composers were antisemitic.
Not sure where you got that information from but it’s definitely mistaken. Sure there were some high-profile antisemitic composers, Wagner springs to mind, but most (and there were many hundreds of composers in the music-era commonly referred to as classical, i.e. 17th-early 20th Centuries) were not in the least bit. Many (for example, Mahler, Mendlessohn, Shoenberg, Suk) were Jewish themselves and many (including Dvorak, Elgar, Borodin, Bruckner) were decidedly prosemitic. And, yes, some people won’t listen to Wagner as a result of his antisemitism, but to not listen to any classical music whatsoever because you believe all of them to be antisemitic is just mistaken.