Don't forget that the cloggies founded New Amsterdam until we took it off them and renamed it New York. Additionally Gibraltar was stormed by Dutch and British Marines. Probably the greatest American president of the 20th century was one of the NY Dutch aristocracy.
All I've got to say on that subject is that Hannibal's army raped and pillaged their way through the mainland and that the Moors were Arabs and not "niggers" although I can see how such a distinction could be lost on the average American.
You are right though, many Sicilians don't really consider themselves Italian as such. Hell even the language is so different!