With respect to
"16 But behold, according to the scriptures, this stone [The Savior] shall become the great, and the last, and the only sure foundation, upon which the Jews can build.
17 And now, my beloved, how is it possible that these, after having rejected the sure foundation, can ever build upon it, that it may become the head of their corner?"
I suppose that those "of the Jews" such as the apostizing Nephites and Laminites could be said to have rejected the Savior when they apostize. Therefore, I guess that references to the Nephites and Laminites do fit in with verses 16 & 17. Also I found a number of references with respect to Jews accepting the Savior when they are gathered to Jerusalem before the last days. Consequently, it does seem that Jacob does fulfil his promise in verses 16 & 17.