Um, hate to interrupt, but what exactly does religion have to do with a person's character? I myself am agnostic, which means I do not believe in a deity of any sort unless proven by science and logic otherwise.
Christianity, along with many other religions, branches into many different forms, and the reason for this is that sacred religious documents such as the Old and New Testaments (Christianity), the Torah (Judaism), the Quran (Islam), the Holy Bible (Christianity/Judaism) and other such texts. Nobody, and I mean NOBODY, is a "fake" in the eyes of religion. Everyone has a right to their own beliefs, not just one strict version of it.
Christianity is a religion with similar ideas to Judaism with a historical figure known as Jesus of Nazareth, more commonly known as Jesus Christ, as the messiah, or savior. He was put on a cross by the Roman government, fearing his growing influence. According to the New Testament, a few days after his death, he came back from the dead, and so he was reborn into a deity of worship, along with his father, God, although his biological father was Saint Joseph, husband of Jesus' biological mother the Virgin Mary.
Protestantism is a form of Christianity originally started by an Augustinian monk named Martin Luther. Displeased with the Catholic Church's use of indulgences (saving from sins sold by the Church at the time) for financial gain (similar to modern-day televangelists). Thus, Martin Luther wrote The Ninety-Five Theses, a document consisting of ninety-five reasons why indulgences, among other things, were a manipulation of faith by the Church. Martin Luther began preaching these ideas, and so a religion was born.