Deism teaches the importance of God-given reason. Deists apply their reason to the designs in Nature and believe those designs presuppose a Designer. Since Deism values the exercise of God-given reason, Deists reject the claims made by the "revealed" religions of having the word of God in their particular scriptures such as the Koran, Bible, Torah, etc. To Deists, the only possible word of God is the Universe itself.
Another belief held strongly by most Christians is that all of your sins, including the non-existent "original sin", can be washed away by the blood of Jesus if you have the "faith" to believe that Jesus is God's only son and that he died on the cross for your sins. However, if you are honest and look at this belief objectively, you soon see the Christian "word of God", the Bible, is not clear at all on this belief. And this belief that people are saved from burning in Hell for eternity by faith alone is a key part of most forms of Christianity even though their Bible is not at all clear on this most important question. The fact that many teens in the Christian community are no longer accepting these unreasonable man-made Christian doctrines is yet more indication the progress is on the way!
Ms. Dean should be thankful that many Christian/Biblical teachings are pretty much ignored these days. For example, she would be out of a job if Bible teachings about women were taken seriously. Bible teachings such as 1 Corinthians 14:34-36 which instructs, "Let your women keep silence in the churches: for it is not permitted unto them to speak; but they are commanded to be under obedience as also saith the law. And if they will learn any thing, let them ask their husbands at home: for it is a shame for women to speak in the church." As a member of the United Methodist clergy and a professor and author she is in direct violation of this ignorant Christian teaching.
An objective look at the entire Bible will let us know there is no way to be a "fake" Christian since there is really no set definition of what a real Christian is. As the Deist Thomas Paine wrote, "The Calvinist, who damns children of a span long to hell to burn forever for the glory of God (and this is called Christianity), and the Universalist who preaches that all shall be saved and none shall be damned (and this also is called Christianity), boast alike of their holy [revealed] religion and their Christian faith."