These scriptures make racism impossible to maintain for a Christian.
John 13:34-35 A new commandment I give to you, that you love one another; even as I have loved you, that you also love one another. 35 By this all men will know that you are my disciples, if you have love for one another."
Ephesians 2:14-16 For he is our peace, who has made us both one, and has broken down the dividing wall of hostility, 15 by abolishing in his flesh the law of commandments and ordinances, that he might create in himself one new man in place of the two, so making peace, 16 and might reconcile us both to God in one body through the cross, thereby bringing the hostility to an end.
Galatians 3:28 There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus.