1 Nephi 15:17

and this is what our father meaneth; and he meaneth that it will not come to pass, until after that they are scattered by the Gentiles; and he meaneth that it shall come by way of the Gentiles, that the Lord may shew his power unto the Gentiles, for the very cause that he shall be rejected of the Jews, or of the House of Israel;

This is what our father means. He means it will not happen until after they are scattered by the Gentiles. He means it will come through the Gentiles, so the Lord can show his power to the Gentiles, because he will be rejected by the Jews, or the House of Israel.

“That’s what Dad meant. It won’t happen until after the Gentiles scatter them. God will show his power through the Gentiles precisely because the Jews—the House of Israel—will reject him.”