If they are *Christian beliefs* then by definition they are not false. But if they are *false beliefs* then by definition they are not Christian. Pseudo-Christian would be applicable. But we cannot pretend that all beliefs are Christian beliefs.
No matter which way you cut it, Mormonism is not Bible Christianity, and Bible Christianity is not Mormonism. But all Christians have two options: (1) totally ignore Mormonism (unless their clean-cut missionaries come to your door), or (2) show why Mormonism is not Bible Christianity, and hope to educate some who may not be aware.
The opening poster chose to show us why a former Mormon exposed the errors of Mormonism. You can simply ignore this thread or you can agree that Mormonism is not Bible Christianity. Long ago I purchased the book by the ex-Mormon Tanners to see what Mormonism was all about. It was very revealing.
Let's focus on the authority of the Bible as the Word of God. Here is what Sandra Tanner writes:
How Does the LDS Church View the Bible?
By Sandra Tanner
While Christians view the Bible as the final authority on doctrinal matters, the LDS Church holds that their other books* of scripture and their prophets are more reliable than the Bible. [Those *other books are (1) the Book of Mormon, (2) Doctrines and Covenants and(3) the Pearl of Great Price as listed in
Scriptures]
Christian View of the Bible
Accurate—
"All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, thoroughly furnished unto all good works." (2 Tim. 3:17)
Sufficient—
"These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God." (1 John 5:13)
Complete—
"But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed." (Gal. 1:8-9)
Authoritative—
"If any man think himself to be a prophet, or spiritual, let him acknowledge that the things that I write unto you are the commandments of the Lord." (1 Cor. 14:37)
LDS Church View of the Bible
Corrupted—
"We believe the Bible to be the word of God as far as it is translated correctly; we also believe the Book of Mormon to be the word of God." (8th article of faith)
Insufficient—
Joseph Smith taught that "many important points touching the salvation of men, had been taken from the Bible, or lost before it was compiled " (History of the Church, v. 1, p. 245)
Need additional revelation—
"We believe all that God has revealed, all that he does now reveal, and we believe that he will yet reveal many great and important things pertaining to the kingdom of God" (9th article of faith)
Subordinate to new revelation—
"In addition to these four [Mormon] books of scripture, the inspired words of our living prophets become scripture to us. Their words come to us through conferences, Church publications, and instructions to local priesthood leaders." (Gospel Principles, p. 51-52)
How Does the LDS Church View the Bible?