You can't have it both ways. Your faction can't be both the underdog and the triumphant party at the same time. If Schoenberg et al fell out of favor and ended up in the dustbin of musical history, then you can't complain about his influence. If, on the other hand, you think he is responsible for the "extinction of the greatest family of music in history", then you must concede that he is still taken seriously by those in the know.