The disciples of Christ were easily identified by people because of the manner in which they lived their lives. No wonder the bible said in Matthew 7:16 that by their fruits you shall know them. It's not by saying we are Christians. It has to show.
People need to see it by the way we live our lives. Our mouths can be saying one thing and our mouths will be displaying something else. That simply means that such person's Christianity is not genuine. It's not just enough to be born in a Christian home.
It is not a name that we just inherit, it is a personal experience. Nobody is actually a Christian at the moment of birth. We were all born sinners. In order for us to translate from that sinful nature and becoming a true believer and disciple of our Lord and savior Jesus Christ we need to welcome Him in our lives.