They're coming from an anti-missionary viewpoint: why go and evangelize, since God has 'eternally saved' his elect in yonder holler, continent, etc.?
It was dreamt up to excuse their anti-missionary dogmas.
Why not go and preach the kingdom of God, as a witness? Matt 24:14
Did Paul preach the kingdom of God? --- And now, behold, I know that ye all, among whom I have gone preaching the kingdom of God, shall see my face no more. Acts 20:25
Now when they had passed through Amphipolis and Apollonia, they came to Thessalonica, where was a synagogue of the Jews: And Paul, as his manner was, went in unto them, and three sabbath days reasoned with them out of the scriptures, Opening and alleging,
that Christ must needs have suffered, and risen again from the dead; and that
this Jesus, whom I preach unto you, is Christ. And some of them believed, and consorted with Paul and Silas; and of the devout Greeks a great multitude, and of the chief women not a few. But the Jews which believed not, moved with envy, took unto them certain lewd fellows of the baser sort, and gathered a company, and set all the city on an uproar, and assaulted the house of Jason, and sought to bring them out to the people. And when they found them not, they drew Jason and certain brethren unto the rulers of the city, crying, These that have turned the world upside down are come hither also; Whom Jason hath received: and these all do contrary to the decrees of Caesar,
saying that there is another king, one Jesus. Acts 17:1-7
Is that passage about the kingdom of God, that Paul preached everywhere he went? Why did king Jesus, the Christ, must suffer and be raised from the dead relative to the kingdom of God?
Was the Son of God 100% man?
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God. John 3:3
And he is the head of the body, the church: who is the beginning,
the firstborn from the dead; that in all things he might have the preeminence. Col 1:18
1 Cor 15:22,23 For as in Adam all die, even so in Christ shall all be made alive. But every
man in his own order:
Christ the firstfruits; afterward they that are Christ's at his coming.