People from just about every country consider themselves superior, or at least the older generations did.
But Vito uses the term "Sicilian" for someone cunning and clever enough with the balls to stay in the mafia business, and usually those people were mostly only Sicilians since the mafia was from Sicily.
And anyways, about the anti Afroism, well today people continually disgrace gays, by calling something that they don't like "gay" and using the word ****** as an insult.
50 years from now jaws will be dropping, when they listen to music that slams gays.