No, I don't believe that God raised them up however, I find it interesting (particularly in light of Ray's post) that the seeds of truth are there.
In discussion with a couple of LDS that told me that they base their beliefs on the Bible first (I think that might have been a bit of "political correctness") then the Book of Mormon. They then rather sheepishly told me that they have "prophets" whose guidance and counsel is the next level for doctrine. I told them that it was no problem to me to have modern prophets and introduced them to EGW's book "The Great Controversy". They were intrigued and requested copies that they could take with them when they went back home (and were allowed to read non-LDS books).
We then had an interesting discussion on the Sabbath. I pointed out that the Bible only advocates the seventh-day Sabbath - they agreed. I pointed out that their three main books, "Book of Mormon", "Pearl of Great Price" and "Doctrines and Covenants" refer to the seventh-day Sabbath - they agreed. So I asked them why they keep Sunday in line with the RC church. They said that one of their "prophets" had made the decision in the 1960s.
I pointed to the books piled on the table in front of us and said, the Bible, which I believe is the word of God says seventh day; the next layer, which you believe are the word of God say seventh day; however, a man comes along and says, in line with the RCC, Sunday - and you follow his word not God's. Why? I quoted that if he speaks not according to the law and the testimony... they nodded in agreement. It was a testing time for them as they were about to leave the mission field and they left with some of my wife's food inside them and a copy each of the GC.
As a footnote, I tried this same technique with other Mormons and caused one to lose his temper and start shouting at me. I have never seen a Mormon react in such a way before. Obviously, it is a testing subject for them. So, God may not have inspired them but the seeds for them to come to a knowledge of the truth are there within their own writings.
In regard to the Book of Mormon, I have had the same experience. When you first meet them they claim that their first allegiance is to the Bible but, as you said, Gabe, it soon becomes apparent that the Bible claim is so that they can try and proselytise Christians. However, so much in the Book of Mormon (like the Qur'an) is an "adaptation" of the Bible so it can be confusing.
I agree that they tend to be nice people but, yes, some of the doctrines...