A significant number of people do not believe that Mormonism is Christianity, according to this poll.
And a great many people, myself included, believe that Mormonism is a pseudo-Christian cult. In other words, it uses the language of the Bible, and bases many of its doctrines on peculiar-to-Mormonism-only explanations of Bible passages while claiming that Mormonism alone can interpret the Bible.
So what are the other characteristics of a pseudo-Christian cult? Here is an excerpt from my book Why We Left A Cult: Six People Tell Their Stories (Baker Book House 1993.)
Here is the excerpt:
For more information, see The Mormon Mirage 3rd Edition: A Former Member Looks at the Mormon Church Today (Zondervan, 2009). Also available as an audiobook and as an expanded-text E-book for Nook, Kindle and other reading devices.