“31 And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name Jesus.32 He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David:33 And he shall reign over the house of Jacob for ever and of his kingdom there shall be no end.” Mary’s Holy Spirit inspired speech. 17 And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just to make ready a people prepared for the Lord.” The promise of Elijah coming first was from Jewish prophets, to prepare the Jewish people for the Jewish Messiah.
Luke chapter 1 The angel “16And many of the children of Israel shall he turn to the Lord their God. Once you are willing to pay absolutely no attention to the Holy Spirit inspired songs of praise of both Mary and Zechariah (John the Baptist’s daddy) that speak of a necessary physical blessing upon the nation of Israel, the nation that the Messiah of Israel came to save, you can accept preterism.