Almost everyday I get asked this question, at first my responses were, 'because I just don't..' Perhaps it was my ignorance at the time, however, now when I get asked this question I respond back with the very same, 'Why don't you believe in God?'
My reasoning behind this question is relatively quite simple; many people who believe in God & Jesus actually don't. I say this because there is so much hate and discrimination within forms a Christianity. When Jesus spoke of acceptance and love; peace and justice many people now have turned those ideals into hate and persecution; judgement and denial. The Crusades, Spanish Inquisition, slavery, denial of marriage, all supported by the 'words of God' that never existed.