The film ends with the hero forsaking the fame and fortune he found in America, as well as his Jewish-American girlfriend, to marry his childhood sweetheart and, it is broadly hinted, to succeed to his father's position as cantor of the Belz Synagogue.
In real life, if this had happened, he would have almost certainly been caught up in the terrible events of 1939-1940: many Jewish residents of the real town of Belz were forced to flee to the Soviet Union during the joint German and Soviet invasion of Poland in September 1939; those that remained, together with other Jewish refugees, were deported to Hrubieszów, another small town in Poland, and from there to the Sobibor extermination camp. The synagogue itself was destroyed by the Nazis during the war and demolished in the 1950's.
Goldin suffered a heart attack halfway through the films production, and died September 19, 1937. Thus being "uncredited" in the film.