when i was in high school (70’s) u did not refer to the italian kids as sicilian unless u wanted a fight.
My father in law was Sicilian. My mother in law was Calabrese. Of course, being old Italian, he always considered his wife as “stupid”. You cook, clean, wash my clothes and shut your mouth. Horrible to watch.
Sicilians are like Mexicans of Italy from what I know from the idiosyncrasies within Italian nationalism.