I think what this guy says is pretty telling, and applies to the lot:
Ask yourself this simple question: Why, when you read the Bible, are you not left in awe? Why doesn't a book written by an omniscient being leave you with a sense of wonder and amazement? If you are reading a book written by the all-powerful, all-knowing, all-loving creator of the universe, wouldn't you expect to be stunned by the brilliance, the clarity and the wisdom of the author? Would you not expect each new page to intoxicate you with its incredible prose and its spectacular insight? Wouldn't you expect the author to tell us things that scientists have not been able to discover yet?
Yet, when we open the Bible and actually read it, we find it is nothing like that at all. Instead of leaving us in awe, it leaves us dumbfounded by all of the nonsense and backwardness that it contains. If you read what the Bible actually says, you find that the Bible is ridiculous. The examples shown above barely scratch the surface of the Bible's numerous problems. If we are honest with ourselves, it is obvious that an "all-knowing" God had absolutely nothing to do with this book.
The reason why the Bible contains so much nonsense is because God is imaginary. The Bible is a book written thousands of years ago by primitive men. A book that advocates senseless murder, slavery and the oppression of women has no place in our society today.
Update: I should say that I've only glanced at the Book of Mormon. That's why I didn't answer your last comment here, T.F. I didn't mean to ignore you.