There are tons of so-called "racist Whites" who would not bat an eye at voting for a guy named "Ted Cruz" who doesn't exactly look like he's from England. That would not have been the case in the 1950s.
This is ahistorical. In the 1950s, Cuban native Desiderio Arnaz starred alongside his white American wife Lucille Ball in the most popular television program in the country. Had there been any thought that this was an interracial pairing, that would not have been possible. In the realm of politics, Leander Perez spent half a century as caudillo of Plaquemines Parish, perhaps the most virulently racist local government in the country. As both I and TheReckoning have pointed out in this thread, what is historically unusual is the idea that white Spanish-speakers belong to a different category than white English-speakers.
Fine, maybe the 1950s is too late; there was certainly a decline in a more "Nordicist" type of racism after World War II, after all. However, the established "White" class of Americans VERY clearly discriminated against those of Southern European heritage in a decade like the 1920s much more than they did Northern European immigrants, and the scope of acceptance among European Americans very clearly gets more narrow the further you go back (e.g., German and Irish immigrants facing discrimination for not being English in the 1800s). I don't see how that can really be denied. Again, the term "White" is meaningless in this context unless it is more conceptual than "color of that guy's skin."
