Bottom line: Look, if there was no 100% "apostasy" of the Christian faith & the Christian church (Protestant/Catholic/Orthodox) as claimed by Joseph Smith, then no "restoration" needed.
So the translation of this is "We're locked into accusing the Christians of being "apostates" (like the Muslims accusing the Christians of being "infidels").
A "restored Christianity" (what LDS call themselves) is only necessary if there was a 100% "failed Christianity."
The restoration that matters is the one Christ will accomplish when he comes to separate the wheat from the tares, and to recover the treasure he purchased.
“They’re locked into the Nicene Creed . . . We’re locked into the restoration and the experiences of Joseph Smith,” said Elder M. Russell Ballard, a senior leader of The Church of Jesus Christ of Latter-day Saints. “And that will undoubtedly be an issue until God himself comes.”
Can’t get much clearer than that. Note that this distinguishes them from both Christians AND Jews because it puts Old Joe first.
If anyone thinks Romney wasn’t carefully groomed to be a Trojan Horse doesn’t know how this all works.
2 nephi 31:21 "...and now, behold, this is the doctrine of Christ, and the only and true doctrine of the Father, and of the Son, and of the Holy Ghost, which is one God, without end. Amen"
Alma 11:44 "...arraigned before the bar of Christ the Son, and God the Father, and the Holy Spirit, which is one"eternal God..."
The quotations are consistent with the doctrine of Nicene Creed. later Joseph Smith would teach polytheism ( many gods) at the funeral one of the elders, in doing so he effectively changes the doctrine of God that they taught and rejects that of the book of Mormon. They believe not simply in evolving revelation through the apostle in Utah but effectively an evolving truth of God. Elder Ballards reply is a demonstration that the LDS does not in fact believe the book of Mormon.