It's not 1950. The WASPs lost their lock on the establishment around the time my father was born. The Ivy League graduate Liberal intelligentsia have been the establishment for 40 years on the outside.
Jeb's Catholicism is not a big deal for his electability or this would not be the first time I'd heard of it. By this time Mitt Romney's run I'd read multiple discussions on his Mormonism.
America has a love/hate relationship with snobbism and elitism.
I think very roughly, Americans are fine with economic classes, but not with social classes. Probably because even our rich are mostly new money outside of Manhattan elite.
We love us some Warren Buffet, but hate fatcat, bluebooded new york bankers.
It probably explains why reality TV is obsessed with following around Rich people doing mundane things.