I agree entirely. It’s a song that melds with the plot and character, as you describe, but also explicitly identifies that one aspect of the change that so rattles Father is caused by the influx of immigrants: the Germans, the Poles, the Jews. I think it’s a brilliant number.
Laura, who nonetheless wishes that Lynn Ahrens had worked Hub Perdue’s nickname into the lyrics—“the Gallatin Squash”
(Yes, I’m married to a sabermetrician; how are you?)