Racism is actually unscriptural. The Bible teaches Eve is the mother of ALL LIVING!
Genesis 3:20 (KJV)
20 And Adam called his wife's name Eve; because she was the mother of all living.
This makes us all ONE RACE the Human Race!
The false teaching of "The Theory Evolution" is what gives this evil act of hatered its power.
If evoultion were true there could be potentially a lower evolved form of humans. This is why the whole entire theory is so very derogatory and degrading. Racism was an invention of Satan to bring division and hate to God's beautiful creation. We were all created by God equally and equally loved.
Proverbs 22:2 (KJV)
2 The rich and poor meet together:
the Lord is the maker of them all.
The problem with Satan's plan is you have to be and ignorant of the truth in order to even fall for this trap. This is why Pastors and religious leaders need to speak up and proclaim the truth. We need to preach LOVE! We don't have a race problem, we have a LOVE problem!!! The reality is, there is no such thing as race, there is cultural differences and human nature is to criticize what is not part of their own cultural heritage rather than understand and appreciate their differences. We do not have to agree with another culture to love the people of that culture.
1 John 2:8-11 (KJV)
8 Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.
9 He that saith he is in the light, and hateth his brother, is in darkness even until now.
10 He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.
11 But he that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes.
So that takes us back to the question can a Christian be racist? It is impossible to be racist if there are no races but it is also impossible to be a Christian and have hatred in your heart for anyone regardless of skin tone. Those who have hatred in their heart are not Christians regardless of what they call themselves.
James 2:9-10 (KJV)
9 But if ye have respect to persons, ye commit sin, and are convinced of the law as transgressors.
10 For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all.