Continuing with his Isaiah-fest, Joseph Smith lifts the entirety of Isaiah chapter 3 for his own records.
I would like to know why Nephi felt the need to quote so much Isaiah. Considering that he was etching these words into metal plates, you'd think he'd have been a little more economic about what he wrote. Why labor over words that are already preserved in another record? Not only is there a record for his people (you know, the one he's copying from), but there's going to be a Bible for everybody else later--a fact you'd think God would have revealed to him.
I suppose you could make the argument from a Mormon perspective that the Bible has been vandalized--that evil men have altered the texts over the centuries and removed "plain and precious truths" from the Bible (Joseph Smith: A Master of Textual Efficiency). But if that were the true purpose behind the Isaiah sections in the Book of Mormon, why are the only differences between 2 Nephi 13 and Isaiah 3 punctuation changes and slight re-wordings that don't change the meaning in any significant way?
Like I've said before--filler.