Isaiah 49:5-6 “And now YHVH has spoken, He Who formed Me (Messiah YAHU’SHUAH, a.k.a. Messiah ben Yosef in Judaism) in the womb to be His Servant, to bring Jacob (restored , reconciled and re-united 12-Israel) back to Him, to gather (10 ?) Israel for Him. ‘It is not enough for You to be My Servant to restore the (12 ?) Tribes of Jacob and bring back the survivors of (10 ?) Israel. I will(also) make You the Light of the nations so that My Salvation may reach to the ends of the earth.'”
Thus, Messiah is to reconcile and re-unite the 2 estranged Houses of Israel and to “be a Light unto all the other nations.” You can read more about this exciting Prophetic reconciliation (which is in process of fulfillment right at this very time) at: Reidentifying the Lost 10 Tribes of Israel, The Return of the Captivity of Israel
The authentic Gospel has been contorted and replaced by a watered-down version of a ‘Grace-only’ and ‘Holy Spirit inspired’ licentious anti-Torah ‘Gospel’ of noncommittal, to deceive and mislead the personal believer.