As a black Pastor who works for a "white" conference I would say that many white's have moved congregations and have not necessarily left the church. They may need to come back to Jesus but not necessarily to the churches they left. Many left for understandable reasons, some just left.
I will hold my prescriptions to allow whites who have left or know people who have left to give theirs first.
This great subject brought me out of retirement (for now, at least).
As a conservative Republican white deacon in a liberal democrat black church, I have seen many situations where it was best just shut up about worldly topics. We have worshiped together for over 2.5 years now and I love my church family! I don't have a problem with the ordinance of humility.
Our church consists of:
Bahamians
Jamaicans
Haitians
Caucasians
Hispanics
I have concluded in my situation:
1. It's not the color of skin that is a problem. I hug 'em all! The tension points can come from a cultural thing. I've had great open conversations with my black church family members and several have told me that they were raised to distrust white folk. That's a hard lesson to shake, even into adulthood. We know white families say basically the same thing to their kids about minorities. It tells me that we either find and neutralize the source of that devilish propaganda or we wait another generation or two and watch nothing change!
2. Racism exists in all cultures. How God will deal with this to prepare a people for eternity, I do not know. There is no human answer to this one.
3. Worldly influences keep this problem alive. A few minutes of gangsta rap or a few minutes of VH1 will show you that we'll never get past the tensions without spiritual help. Church members that dabble in worldly things have a greater fight on their hands to overcome racism.
4. Black Adventist churches promote racism from the pulpit. I have seen this one over and over... It's a regurgitation of what you'll hear the NAACP preach. Whites just aren't into that message of 'pity us poor blacks'.
5. Jesus and His redeeming power for ALL people is simply not preached enough.
6. All races dwell too much on the destructive differences we have, not the similarities. We don't laugh with each other enough and believe me, we all have very funny stories to tell about the cultures in which we were raised. Humans are still humans.
7. When I got married (16 years ago on 7/11) I purpose in my heart to enjoy and celebrate the gifts both Mrs TW and I bring to the marriage. If we are both into pulling the cart in the same direction, then our differences actually compliment each other. Same for a mixed-race church.
8. Every culture or race thinks they are better than everyone else. I've heard Cubans bust on Mexicans. I've heard Nicaraguans bust on white Americans. I've heard Filipinos bust on the Chinese and Koreans. Satan has to be enjoying this.
Now I'd love to hear Laz weigh in.