Jesus Mission was never to come and save all mankind
The Lord Jesus Christs Mission was never to come and save all humanity or mankind, but only a remnant of it, which is seen when we consider Isa 49:3-8
3 And said unto me, Thou art my servant, O Israel, in whom I will be glorified.
4 Then I said, I have laboured in vain, I have spent my strength for nought, and in vain: yet surely my judgment is with the Lord, and my work with my God.
5 And now, saith the Lord that formed me from the womb to be his servant, to bring Jacob again to him, Though Israel be not gathered, yet shall I be glorious in the eyes of the Lord, and my God shall be my strength.
6 And he said, It is a light thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth.
7 Thus saith the Lord, the Redeemer of Israel, and his Holy One, to him whom man despiseth, to him whom the nation abhorreth, to a servant of rulers, Kings shall see and arise, princes also shall worship, because of the Lord that is faithful, and the Holy One of Israel, and he shall choose thee.
8 Thus saith the Lord, In an acceptable time have I heard thee, and in a day of salvation have I helped thee: and I will preserve thee, and give thee for a covenant of the people, to establish the earth, to cause to inherit the desolate heritages;
Now lets start here at Vs 3, Tis Christ speaking, He is God's Servant Elect Israel also Isa 42:1, and in Isa 49:5 , as God's Servant His mission for God was to " to bring Jacob again to him"
In Vs 6 "be my servant to raise up the tribes of Jacob" and " to restore the preserved of Israel"
We have 3 Salvation statements here, first " to bring Jacob again to him"
He was to bring them back to God, yet not all men without exception, but particularly Jacob, or the Sons of Jacob Mal 3:6
6 For I am the Lord, I change not;
therefore ye sons of Jacob are not consumed.
or Jacob them He Loved Mal 1:2
The burden of the word of the Lord to Israel by Malachi.
2 I have loved you, saith the Lord. Yet ye say, Wherein hast thou loved us? Was not Esau Jacob's brother? saith the Lord:
yet I loved Jacob,
See Rom 9:13 !
Then you have the seed of Jacob Ps 22:23
23 Ye that fear the Lord, praise him;
all ye the seed of Jacob, glorify him; and fear him, all ye the seed of Israel.
Isa 45:19
19 I have not spoken in secret, in a dark place of the earth:
I said not unto the seed of Jacob, Seek ye me in vain: I the Lord speak righteousness, I declare things that are right.
Since its the Seed of Jacob He is to bring back, its to that Seed its bidded to Seek the Lord ! In fact compare Isa 45:19 with Acts 17:27
27 That
they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us:
They no doubt is the Seed of Jacob, not all mankind without exception !
Or the House of Jacob Isa 2:5
5 O house of Jacob, come ye, and let us
walk in the light of the Lord.
Isa 10:20
20 And it shall come to pass in that day, that the remnant of Israel,
and such as are escaped of the house of Jacob, shall no more again stay upon him that smote them; but shall stay upon the Lord, the Holy One of Israel, in truth.
Isa 14:1
For
the Lord will have mercy on Jacob, and will yet choose Israel, and set them in their own land: and the strangers shall be joined with them, and they shall cleave
to the house of Jacob.
Lk 1:33
33 And
he shall reign over the house of Jacob for ever; and of
his kingdom there shall be no end.
John Gill on this verse writes:
And he shall reign over the house of Jacob,.... Not over the Jews, the posterity of Jacob, in a literal sense; but over the whole Israel of God, consisting of Jews and Gentiles. For as his father David reigned over the Idumeans, Syrians, and others, as well as over the house of Judah and Israel, so this his son shall reign over both Jews and Gentiles: his kingdom shall be from one end of the earth to the other, even over all the elect of God; who in successive generations call themselves by the name of Jacob, and surname themselves by the name of Israel, of whatsoever nation they be; and this reign of his shall be
for ever, and of his kingdom there shall be no end; referring to
Isaiah 9:7 see also
Daniel 2:44 Daniel 7:14 he shall reign in the hearts of his people here unto the end of the world; and with his saints a thousand years in the new heavens and new earth; and with them to all eternity, in the ultimate glory.