The teaching of the Bible regarding prejudice is that it has no place in the thinking of Christians or the church. As God is not a respecter of persons, neither are we to be.
Creation, sin and grace are all great levelers of mankind.
The fact of creation teaches against any form of racism. Every human is created in the image of God and all people share that equally. Second, sin is an aspect of every person’s nature, regardless of race, nationality, gender, socioeconomic status etc. Finally, God’s grace is shown to people irrespective of anything that might divide us, whoever will call upon the name of the Lord will be saved.
On the other hand, I do not preach on the more political aspects of race relations; Pastors are preachers and teachers, not politicians.