This is what I said and it's what I believe. "I agree that Mormonism is a cult, and I have stated this. What they consider to be the 'most correct book' is NOT the Bible; therefore, much of their doctrine is not biblical."
Another thing to clarify about the above:
LDS Christians do indeed consider the Bible to be scripture and the word of God. For every one year of Sunday School focus on the Book of Mormon, there are two for the Bible. It is indeed prized and not remotely looked down upon.
One thing that is a important difference between Protestant Christian beliefs and LDS Christian beliefs is the methodology for approaching God's Truth. Protestants typically take a Sola Sciptura methodology. LDS Christians are not Sola Scirptura, and very actively look to God to help understand His Truths through the Holy Spirit.
I don't require the English translation of scripture I'm using to be perfect, because God can help me understand the Truth He wants to convey --- that's critical. And I'll readily acknowledge that no translation of scripture is perfect, because translations are inherently flawed. And even to those people whom heard the messages shared firsthand (say you were literally sitting in the Sermon on the Mount audience) still frequently misunderstood and needed God to guide them.
Somebody arguing that I'm a "cultist" because I acknowledge these limitations and the need for God to illuminate His Truths... that just doesn't make much sense. I'm Christ's disciple. He teaches me, and He alone is perfect. No human scribed book is inherently perfect, and while I love those books of scripture, the pieces of pulpy paper aren't my Master. Rather, I'm saved by the living Christ & His blood.