But the gentiles would occupy the land on condition. They would need to serve the God of the land, who is Jesus Christ. (Ether 2: 12.)
When they do, Christ will "bring the fullness of my Gospel from among them." (3 Nephi 16: 10.) Upon removing the fullness, and the gentiles being filled with their pride, priestcrafts, deceits and hypocrisy, the Lord will use the remnant who remain to return judgment upon the gentiles in the same manner the gentiles had earlier returned judgment upon the remnant. (3 Nephi 16: 15.)
As Christ states above, using the words of Isaiah, "a remnant of the house of Jacob" will "go forth among them; and ye shall be in the midst of them who shall be many; and ye shall be among them as a lion among the beasts of the forest, and as a young lion among the flocks of sheep, who, if he goeth through both treadeth down and teareth in pieces, and none can deliver."
We've discussed the "beasts of the forest" and the "flocks of sheep" before. Both categories of gentiles will be swept away. None can deliver them from this coming judgment. The remnant will be the Lord's instrument of judgment upon the gentiles, and the gentile pride, priestcrafts, lyings, deceits will all come crashing down upon them in judgment. Their idols will be trodden down and torn in pieces, for they are their own idols imagining in their own hearts themselves to be greater than any other people. Their image of themselves as high and lifted up will be brought down low, into the dust. (Compare Isaiah 14: 12-17.) How like their master Mahon these gentiles have become. But then rejecting the fullness of the Gospel when it has been offered to a people always carries a heavy price.
The remnant will be doing the work of the Father in that day. For the judgment is the Lord's and not the remnant's. The remnant are only the means by which the judgment is delivered.
Cleansing precedes the blessing. And this blessed land will be Zion. But not while occupied by filthy people who idolize themselves, reject the fullness, support priestcrafts, lyings, deceit and hypocrisy calling it righteousness, truth and beauty. They cannot see their own condition, and will not trust the Lord to reveal it to them. They will say the Lord does not speak any more, and we have enough of the revelations of God. (2 Nephi 28: 27-29.) They will say God has finished His work of restoring truth, given His power to men, and now we must follow men to be saved. (2 Nephi 28: 5.)
But the Lord will prove that He had more to say when the gentiles learn, too late, they trusted in the arm of flesh rather than in the Spirit which saves. (2 Nephi 28: 31.) At that day, despite all the gentile petitions for relief from that God whose fullness they rejected, none will deliver.
The interplay between the gentiles and the remnant is a fascinating subject, with prophetic details given so as to allow us to appreciate the peril we find ourselves as gentiles in these last days. It is good we Latter-day Saints know we are safe and are part of a great, saved and favored community to be preserved against the coming judgments, isn't it? It is good we do not need to repent much if at all to be saved, because as we hear so very often: All is well. All is well.
"And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not. Make the heart of this people fat, and make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and convert, and be healed." (Isa. 6: 9-10.)