I can tell you that it is a blessing to attend an ethnically diverse church. Potlucks are showcases of things like spring rolls, rice and beans, tortillas, and so very much more.
One of my brothers said it best when he spoke of the church. He said it was an education for his young daughters.
I didn't think much of it until I heard about a Bible study going on at a former friend's apartment building. The study was saying that the mixing of the races was wrong, and that it's better to stay within your own kind.
I thought to myself of that comment my brother in Christ made, and came up with this. When we are praising God sees not color, but the common goal to glorify His name.