Tragically, this same syndrome seems to afflict Roman Catholic Voters. My Mom grew up during the Depression, a Boston Irish Catholic. To this day she thinks FDR could do no wrong. When she says “FDR got us out of the Depression” I kindly remind her that it was WW2 that did it.
My Mom says that during the Depression, “Catholics voted Democrat and Protestants voted Republican”.
As if one’s religious affiliation dictated one’s politics.
You can mention that drafting about 10 million young men into the military is an effective way of reducing the unemployment rate. (Admittedly a bit cynical, but nonetheless the truth.)
Irish Catholics were the strongest ethnic group in the Democratic Party outside the South from long before the time of Franklin D. Roosevelt, especially in the big cities, most typically in Boston. They were prominent as local Democrat machine bosses. When Roosevelt came to power and greatly expanded the size of the federal government, these local bosses were thrilled to have more government goodies to hand out to increase their clout.