So , if scripture were completed and closed, d'you mean that the Gospels are not, according to you, scripture?
And, also note that Matt. 2:16 - Herods decree of slaying innocent children was prophesied in Wis. 11:7 - slaying the holy innocents.
That's a prophecy proving Christ as Messiah -- do you think that Christ was the Messiah or not?
That's just another piece of the fairy tale...