We have looked at why Ezk 37:21-28 could not be referring to National Israel.
The second Israel, the Lord Jesus Christ, we know the prophecy cannot be referring to Him, for He was never scattered among the nations or heathen, and the prophecy has a plural fulfillment as in vs
26 Moreover I will make a covenant of peace with them; it shall be an everlasting covenant with them: and I will place them, and multiply them, and will set my sanctuary in the midst of them for evermore.
That Leaves us with one more possibility, the Israel of God, all those who believe in Christ..
Lets see how this fits !
#1. God will gather the children of Israel from among the nations, wherever they are scattered..
Is that not what the high Priest prophesied about in regards to Christ death ? Jn 11:49-52
49 And one of them, named Caiaphas, being the high priest that same year, said unto them, Ye know nothing at all,
50 Nor consider that it is expedient for us, that one man should die for the people, and that the whole nation perish not.
51 And this spake he not of himself: but being high priest that year, he prophesied that Jesus should die for that nation;
52 And not for that nation only, but that also he should gather together in one the children of God that were scattered abroad.
This is compatible also with Jesus words Jn 10:15,16,18,19
15 As the Father knoweth me, even so know I the Father: and I lay down my life for the sheep.
16 And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.
Was not that the underline motive for Jesus sending His disciples unto all nations Matt 28:18-19
18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.
19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
Amen, that's the reason for the great commission, its for in the gathering in of the seed of Abraham in all Nations, according to God's promise Gen 17:5
5 Neither shall thy name any more be called Abram, but thy name shall be Abraham; for a father of many nations have I made thee. 4