Christians are those who realise that they are sinners in need of forgiveness. If we could be like Christ, we would not need to be forgiven. Non-believers rarely have any real idea of what a Christian is meant to be. Do you know what a "Christ" is? I'll tell you. A Christ is a Messiah, appointed by God to make God known to man. There has been only one Christ. To be a Christ-ian means to be of Christ, as an Australia-n is of Australia. Christians are not just blind followers of a Jewish guru from Zero AD. Jesus changed the world forever. Christians have Christ living inside them, leading, guiding, directing, teaching, healing, delivering and empowering us to be the kind of people that God wants us to be. We are not perfect. One of the early leaders said that we have God's treasure (Jesus) in jars of clay.
Have you ever met a real Christian? You will know that they are different even if you do not know why. If you are serious about knowing the truth, ask God to show you. He will. God is far more willing to to reveal Himself than people are willing to look.