Jesus died to redeem men back to God, creating one Body. We are now identified as Brothers and Sisters. Christ is the head of the body and God is Father.
The Scriptures use the word 'nations,' which means ethnos, people, groups.
The blood of Christ reconciles all ethnos who believe to God and their fellow brothers and sisters.
When we put off the old man we should put off partiality, prejudice, and racism. We put on love.