"You are all sons of God through faith in Christ Jesus, for all of you who were baptized into Christ have clothed yourself with Christ. There is neither Jew nor Greek, slave nor free, male nor female, for you are all one in Christ Jesus." NIV translation
This passage should eliminate all discrimination in the life of a Christian. When we realize that we are all either "sons of God" or lost, then it should help us to see others in a different light. All the "isms" in the world such as racism, sexism, etc. should be taken off when we put on the new clothes of a Christian (see Colossians 3).
"If you belong to Christ, then you are Abraham's seed, and heirs according to the promise." NIV translation
Jesus made it possible for us to be adopted into the family of God. This family was promised to Abraham and, as family, we are also heirs.