Yeah sure buddy, some Romans claimed that Romulus and Remus were ancient Trojans who fled Troy and settled in the Tiber and founded Rome, but there's not any evidence to support that statement. Furthermore the Romans were not descendants of Greeks because Greeks never really bothered to colonise north of Neapolis (Napoli) but they did come in contact with Romans. Romans were Latins, am Italic tribe. Latins lived in the area called Latium. Latins came in contact and waged war against Etruscans, another Italic tribe.

Spanish and Italians aren't ancient Greek descendants as the Spanish were part of an Iberian culture (and later some Arab influence, but not much) and it's a bit more complex for the Italians.

Modern Greeks aren't Turkish, who the fuck taught you that? There was some Turkish influence in the area but not so much, a lot of Greek people living in Anatolia converted to Islam so a good portion of Turkey is actually Greek to be honest with you. There weren't a lot of mixing between Greeks and Turks because of religious reasons. Marrying a muslim in those days was out of the question. There is a small percentage of Greeks who might have a Turkish ancestor but there are also Greeks with Slavic ancestors, but again, statistic analysis shows little disparity between Northen Greek and Southern Greek DNA, with Northen Greek DNA having more "outside" influence than its southern counterpart.