In fact the coastal cities were still predominantly Greek until the 1920's when they were ethnically cleansed by the forces of General and then President Ataturk ("Father Turk") founder of the Republic of Turkey, occupying all that was left of the Ottoman Empire. The Armenians weren't the only people to be manhandled and massacred by the Turks.
They are mostly ethnically greek-hittite-hatti-armenian-caucasian mix with some semitic elements and some traces of Turks. This is where the rulers (Turks) put their language on the conquered