Where you get that idea from, I would like to know. Show me some proof please!
Why certainly. The LDS Church has set itself firmly removed from Christianity from the very beginning.
“Christianity…is a perfect pack of nonsense…the devil could not invent a better engine to spread his work than the Christianity of the nineteenth century.” - Prophet John Taylor, Journal of Discourses, v. 6, p. 167
“Where shall we look for the true order or authority of God? It cannot be found in any nation of Christendom.” - Prophet John Taylor, Journal of Discourses, v. 10, p. 127
“What! Are Christians ignorant? Yes, as ignorant of the things of God as the brute beast.”- Prophet John Taylor, Journal of Discourses, v. 13, p. 225
“What does the Christian world know about God? Nothing… Why so far as the things of God are concerned, they are the veriest fools; they know neither God nor the things of God.”- Prophet John Taylor, Journal of Discourses, v. 13, p. 225
“Both Catholics and Protestants are nothing less than the ‘whore of Babylon’ whom the Lord denounces by the mouth of John the Revelator as having corrupted all the earth by their fornications and wickedness. Any person who shall be so corrupt as to receive a holy ordinance of the Gospel from the ministers of any of these apostate churches will be sent down to hell with them, unless they repent.” - Apostle Orson Pratt, The Seer, p. 255
“… who, in his right mind, could, for one moment, suppose the Bible in its present form to be a perfect guide? Who knows that even one verse of the whole Bible has escaped pollution so as to convey the same sense now that it did in the original.” - Apostle Orson Pratt, “The Bible and Tradition, without Further Revelation, an insufficient Guide,” Divine Authenticity of the Book of Mormon – No. 3, December 1, 1850, p. 47; see Abanes, One Nation Under Gods, p. 383-384
“After the Church of Jesus Christ of Latter-day Saints was organized, there were only two churches upon the earth. They were known respectively as the Church of the Lamb of God and Babylon. The various organizations which are called churches throughout Christendom, though differing in their creeds and organizations, have one common origin. They all belong to Babylon.” - Apostle George Q. Cannon, Gospel Truth, p. 324
“For hundreds of years the world was wrapped in a veil of spiritual darkness, until there was not one fundamental truth belonging to the place of salvation …Joseph Smith declared that in the year 1820 the Lord revealed to him that all the ‘Christian’ churches were in error, teaching for commandments the doctrines of men.” - Prophet Joseph Fielding Smith, Doctrines of Salvation, v. 3, p. 282
“…the Book of Mormon remains secure, unchanged and unchangeable, …But with the Bible it was not and is not so…it was once in the sole and exclusive care and custody of an abominable organization [Christianity], founded by the devil himself, likened prophetically unto a great whore, whose great aim and purpose was to destroy the souls of men in the name of religion. In these hands it ceased to be the book it once was.” - Apostle Bruce R. McConkie, The Joseph Smith Translation, pp. 12, 13
“Believers in the doctrines of modern Christendom will reap damnation to their souls.” - Apostle Bruce R. McConkie, Mormon Doctrine, see pp. 45-46
“… all the millions of apostate Christendom have abased themselves before the mythical throne of a mythical Christ… in large part the worship of apostate Christendom is performed in ignorance, as much so as was the worship of the Athenians who bowed the Unknown Gods.” - Apostle Bruce R. McConkie, Mormon Doctrine, pp. 269, 374-375
And finally, a slightly “nicer” twist:
“God is not at its head, making that church * – following the appearance in it of Satan – no longer the church of God. To say that Satan sits in the place of God in Christianity after the time of the apostles is not to say that all that is in it is Satanic.” - Kent P. Jackson, “Early Signs of Apostasy,” Ensign, December 1984, p. 9*