A number of religions claim revelation by god. Islam claims Allah revealed his word to Mohammed. Mormons claim that their doctrine was revealed to Joseph Smith by Moroni, and all subsequent doctrinal revisions were revealed to successive church presidents by God. Christians dismiss Islam as simply a fiction and its followers as dupes. They deride Mormon claims as nonsense and Mormonism as a cult at best, not even Christian at worst.
If Christianity was revealed and was not a result of religious evolution how is it that so many pre-Xtian pagan gods share some of the same characteristics and miraculous events as those attributed to Jesus? How is it that so many Christian holidays were co-opted from pagan festivals and observances? Why did the Reformation mutate from Catholicism giving birth to so many new denominations? And exactly which one of the 2800 denominations & sects of Christianity was revealed by God? With their varied rituals and interpretations of God’s words they can't all be revealed; else they'd all be in agreement.
The idea of revelation is just another aspect of man made religious delusion. It’s one religion’s desire to stake their claim to ownership of the ultimate “Truth.” Religious practices have evolved beyond human sacrifice, animal sacrifice, burnt offerings and temple prostitutes, just as technology has evolved from chariots to airplanes. We see it evolving right before our eyes as the Catholic Church accepts Evolutionary Theory, and liberal Christians reject biblical inerrancy and accept science.
Judeo-Christian claims of being the moral beacon and holding the ethical high ground has been falsified many times and is hardly well represented in scripture. Morality evolved, and continues to evolve today -- equal rights for women, gays and minority races; and the gradual elimination of capitol punishment-- none of which were sanctioned by the Bible or revealed by a supreme being.
Religion’s evolution toward liberalism and reason, and morality’s evolution away from the static and bigoted precepts of scriptural declarations is unstoppable, just as evolution of species is unstoppable. Someday the unyielding grasp of religiously interpreted moral dictates will fall to the moral imperatives of a society evolving toward equality and acceptance.