What is Rabbi Silverman's response regarding plays like The God of Vengeance?

In Rabbi Silverman – A Sermon, Temple Emanu-El, Silverman talks about advocating for the Jewish people of New York City and many finding comfort and pleasure in attending Broadway shows. Silverman is appalled at Asch’s play and says he expects to be abused by so-called Christians but not “be hit by a stone in my back by a fellow Jew” (59).