You are a child of God. I do not have to know you personally in order to know this about you. I know it because God has declared it to be so in the Bible. How did this state of things come to be true? God created all of us, and, when the devil kidnapped us through our sins, God became Jesus of Nazareth in order to ransom and adopt us to be His own once again…and forever.
Jesus’ mission was not to divide the human race. It was already divided. He came to bring it together.
Therefore, stop dividing the human race in your mind. Instead, see every person as a fellow traveler with whom you will spend eternity. Human thinking divides people into tribes; divine thinking sees every human being as made in the image of God. Sin may mar that image, but sin is temporary. Its affects will not last forever. The effects of God’s mercies, however, do last forever. “His mercy endureth forever,” as the King James Version of the Bible says.
Therefore, your goal is not to become a Christian, it is to become more like Christ – that is, more like your Father in heaven, the one who created you and adopted you. It will be easier to see yourself as a child of God if you recognize that every human being is a child of God. Then you can get on with the task of imitating your heavenly Dad…and, as you have opportunity, helping your brothers and sisters along the way who don’t see the truth as clearly as you do.