We are moving and want our children to go to a school that will be accepting of their race is this okay?

Okay, here is the question. My children(grandkids) have been in the same school since they started. They are in middle school now. Am I wrong to look for a school strictly based on their race? My granddaughter is Caucasian and my son is mixed. I am just concerned that he will be bullied, he is a very good nature d boy and has not as of yet experienced prejudice from his cl mates. I want him to continue to excel in his cles, and not have to worry about prejudice at this point, and yes, we have talked to him about the hateful things that people may say to him, but this does not make it any easier. If any of you have dealt with this issue please help out.