Thanks, Buttercup. It's natural for some people to feel that way about Zhuan Falun, just as it's natural for all of us to have different beliefs and understandings about the world around us. The important thing is to understand this and be able to respect others beliefs.
I can try to simplify some of the teachings about the above topic for you according to how I understand it. Many religions believe that human beings were created in the image of God. Falun Dafa also holds this belief, and just as different human races have different appearances, so do the Gods that created them. Each race bears a direct relationship to the God that created them, and to his "heavenly kingdom". So when a human being manages to reach the standard of heaven, they will return to that kingdom. However, it's quite rare for a person to reach that. Let's not forget that Falun Dafa is closer to Buddhism than anything else, so most people reincarnate upon death, rather than ascend to heaven. To be honest, I believe that this belief encourages acceptance of racial diversity, rather than prejudice, suggesting that all human beings of all races have divine origin. And as Juli mentioned, the emphasis of Falun Dafa is on cultivating truth, compassion, and tolerance, which I believe harmonizes any beliefs in the practice that might seem to encourage prejudice.