Repeatedly the Bible calls the Christian church a new nation. We are ‘fellow citizens with God’s people’ (Eph. 2:19); we are a ‘holy nation’ (1 Peter 2:9), which literally means we are a new ethnicity. Our relationship to each other in Christ is to be stronger than our relationship to other members of our racial and national groups. When you become a Christian, you are not primarily from Ohio or Germany or Asia; you are not primarily Anglo, African-American, Asian, or Hispanic; you are not primarily white collar or blue collar. You are a citizen of God’s nation.
The Bible says some remarkable things about race when it states that the only true division in the human race is one of faith. There are only two ‘nations’ or ‘peoples’ on earth: those who belong to God and those who do not (1 Peter 2:9–10). God forbids marriage between these two groups of people, unbelievers and believers (2 Cor. 6:14–16), since this is the only way, in God’s view, to marry outside of one’s people. Numbers 12:1–16 presents a striking example of God’s view of interracial marriage: Moses’ wife was a Cushite, an African with dark skin—and a believer in the Lord. Miriam, Moses’ sister, opposed the interracial marriage, and God punished her by turning her leprous, ‘white as snow’ (v.10). God punished her prejudice by making her more white! Thus Christians have a special test for racism. If racial differences are more important to you than differences in belief, you are acting as a racist.
– Tim Keller
Quote taken from The Gospel and Our Prejudice.