All the parables say the same thing. The "caretakers" of the vineyard are being replaced. It goes to a different "ethnos." The Second Temple is done. Jesus Christ is the Foundation of the Third Temple. The old care-takers are to be destroyed. Japeth (the Elder) returns to his Father's vineyard when the second son (Shem) quits.
Fritz Berggren
www.bloodandfaith.com
PS: Japheth the Elder based upon Gen 5:32, Gen 11:10 and Matthe 21:28-31