The last thing I would do is liken the Corsicans to Peurto Ricans. Peurto Ricans are a mix of blacks, natives, and spaniards. The US is of mostly European ancestory, although the identity of the United States is slowing changing. There is a stark racial, cultural, and linguistic difference.
For the majority of the last 2300 thousand years, Corsica has always been part of "Italy" one way or the other. After Roman conquest and control for almost 700 years (where they had been latinized culturally, ethnically, and linguistically), the island had only conquered by other powers for a relatively short period of time before Pisa took control in 1077. After Pisa, the Genoese dominated the island from 1284 to 1729. Genoa sold the island to France for $$ in 1769.
Even Napolean, "Frances" greatest general, didn't see himself as French. In fact his name was changed from Buonaparte (Italian) to Bonaparte to sound more French. On Napoleon's father's side, the Buonaparte family claimed to descend from Genoese mercenaries who came to Corsica soon after 1490 or 1492. Note that by this time Genoa was a junior partner of Venice. On Napoleon's mother's side, the Ramolino claimed to be descended also from a Venetian, the Count of Coll'Alto. His mother hated the French and did not want Napolean to marry his eventual wife.
Keep in mind, it is true that the Coriscan's did not like how they were being treated by the Genoese, and so were more "willing" to be under French power, but they do not want to be seen as, and are not French. Keep in mind, the Florentines see themselves as Florentines, the Pisans Pisans, Romans Romans. To this day, Italians make distinctions as to exactly where they're from. Each city/region has an identity all to themselves and they are proud to make these distinctions, BUT THEY STILL SEE THEMSELVES AS ITALIANS. Corisca is to Italy, as Tuscany is to Italy, as Sardinia is to Italy, as Sicily and Naples and Venice is to Italy. To this day, they're language is a dialect of Italian. Try and find a summary of common phrases in Coriscan and compare it Italian. They're almost exactly the same. Make other cultural and racial comparisons, and you will realize that they should really be part of the Italian nation.