Who is attacking who?
Joseph Smith claimed he had seen both God the Father of Satan and Jesus Christ the brother of Satan. When he asked "these personages" which church he should join, he was told to join none of them, "for they were all wrong; and the Personage who addressed me said that all their creeds were an abomination in his sight" (Joseph Smith History 1:19).
So it's no surprise to see what spirit inspires Mormons to attack Christians, Christianity, and the Bible . . . see the following examples from Mormon Leaders:
"When the light came to me I saw that all the so-called Christian world was grovelling in darkness" (Journal of Discourses 5:73).
"The Christian world, so-called, are heathens as to the knowledge of the salvation of God" (Journal of Discourses 8:171).
"With a regard to true theology, a more ignorant people never lived than the present so-called Christian world" (Journal of Discourses 8:199).
"We talk about Christianity, but it 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" (Journal of Discourses 6:167).
"What! Are Christians ignorant? Yes, as ignorant of the things of God as the brute beast." (Journal of Discourses 6:25).
"What does the Christian world know about God? Nothing ...Why so far as the things of God are concerned, they are the veriest of fools; they know neither God nor the things of God" (Journal of Discourses 13:225).
Daniel H. Wells (Mormon Apostle) -- "The whole system of Christianity is a failure so far as stemming the tide of wickedness and corruption is concerned, or turning men from their evil ways to living lives of righteousness before God our Heavenly Father....the so-called system of Christianity is not only an error and a snare, but is a monstrous iniquity fastened upon the children of men throughout the earth. No wonder that people become infidel.(Journal of Discourses 24:321-322).
Orson Pratt (Mormon Apostle) -- "This class of men, calling themselves Christian, ... is the great ecclesiastical power that is spoken of by the revelator John, and called by him the most corrupt and most wicked of all the powers of the earth, under the name of spiritual Babylon, or in other words Babel, which signifies confusion. This great and corrupt power is also represented by John as presenting a golden cup to the nations, full of all manner of filthiness and abominations" (Journal of Discourses 14:346).
Heber C. Kimball (First Counselor to Brigham Young) -- "Christians - those poor, miserable priests Brother Brigham was speaking about - some of them are the biggest whoremasters there are on the earth ..." (Journal of Discourses 5:89).
Parley P. Pratt (Mormon Apostle) -- "The false and corrupt institutions, and still more corrupt practices of `Christendom,' have had a downward tendency in the generations of man for many centuries ...The overthrow of those ancient degenerate races is a type of that which now awaits the nations call `Christian,' or in other words, `the great harlot that sitteth upon many waters" (Key to the Science of Theology, 1938 ed., pg.106).
Bruce McConkie (Mormon Apostle) -- "What is the church of the devil in our day, and where is the seat of her power? ...It is all of the systems, both Christian and non-Christian, that perverted the pure and perfect gospel ...It is communism; it is Islam; it is Buddhism; it is modern Christianity in all its parts" (Millennial Messiah, pp.54-55).
Bruce McConkie (Mormon Apostle) --"As with other doctrines and ordinances, apostate substitutes of the real thing are found both among pagans and supposed Christians" (Mormon Doctrine, pg.72).
Bruce McConkie (Mormon Apostle) --""And virtually all the millions of apostate christendom have abased themselves before the mythical throne of a mythical Christ whom they vainly suppose to be a spirit essence who is incorporeal uncreated, immaterial and three-in-one with the Father and Holy Spirit" (Mormon Doctrine, pg.269).
Bruce McConkie (Mormon Apostle) --"""The gods of Christendom, for instance, are gods who were created by men in the creeds of an apostate people. There is little profit or peace in serving them, and certainly there is no salvation available through them" (A New Witness for the Articles of Faith, pg.545).