Turkey is highly unlikely to replace the name of Istanbul with a Greek name. Turks don’t hate the Kurds. They oppose Kurdish irredentism and Kurdish Communists. Turks hate the Greeks.
Istanbul is actually a Greek compound word that Turks use now. Constaninople is a Latin and Greek compound name - Constantine of course being a Latin name and polis being the Greek word for city.
Istanbul is a corruption of the Greek phrase istanˈpoli meaning "to the city" or "the City" or "DownTown".