One of the primary reasons millions of Christians believe the Bible is the Word of God is its historicity. The Bible speaks of real people and real events. Even though not every place named in the Bible has actually been located, enough sites have been discovered to give the Bible a considerable amount of trust.
On the other hand, Mormons must place an inordinate amount of trust in a book that has virtually no historical evidence to support its authenticity. No discoveries have been made in the New World to give credence to any of the places mentioned in the Book of Mormon. The LDS Church has yet to produce any clear evidence to support the notion that Nephites and Jaredites were real people groups that existed outside of Smith’s imagination. The idea that the Indian people are Semitic ancestors of the Book of Mormon “Lamanites” also has its share of problems, both historically and genetically.