Idolatry?
Sorry I just got around to getting involved in this thread; just caught wind of it...
I have no problem in the belief that God's word is final. The problem comes in when you try to pin down what that word really is.
If you mean the bible, which translation/version of the bible do you take as THE word? The KJV? The New Life version? The original Greek? The oral tradition which was written down from spoken Hebrew? The Book of Mormon? Just the New Testament? And why only the books which were chosen for the current NT? Why not the Gnostic gospels?
The bible is a book. It is written by man, translated, interpreted, reprinted by man, and applied by man. Whether its author(s) were originally inspired by God or not, man's imperfect filter has been put on it so many times that to try to point to it as a perfect tome, as THE word of God, is truly indefensible.
Of course, that's just my opinion. Your mileage will vary....
Incidentally, I struggle with how you define a different belief set as "Idolatry", unless that belief set involves actually worshiping idols.....