“GOD THAT MADE THE WORLD and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands; Neither is worshipped with men’s hands, as though he needed any thing, seeing he giveth to all life, and breath, and all things; And HATH MADE OF ONE BLOOD ALL NATIONS OF MEN for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation” (Acts 17:24-26).
It is ignorant to say God wants you to stay within your race, or to discourage someone from marrying other nationalities. There is only one human race. All people in a sense are God’s “offspring,” since He created us all (Acts 17:28-29). So, if we really want to trace our roots, let’s really go back. We all started with the first man Adam and his wife Eve (Gen. 1:26-28; 2:7-25). “And Adam called his wife’s name Eve; because she was the mother of all living” (Gen. 3:20).  
The interracial marriage of Moses (a Hebrew), to a black woman/Ethiopian met opposition from his siblings. “And Miriam and Aaron spake against Moses because of the Ethiopian woman whom he had married: for he had married an Ethiopian woman” (Num. 12:1; cf. Jer. 13:23). But the Lord took the side of Moses and defended him (Num. 12:4-14). The Lord is not against nationalities, but unrighteousness (Rom. 1:18). “Then Peter opened his mouth, and said, Of a truth I perceive that God is no respecter of persons: But in every nation he that feareth him, and worketh righteousness, is accepted with him” (Acts 10:34-35; cf. 1 Sam. 16:7; Gal. 3:28).
A mixed marriage is when a Christian is married to a non-Christian, not when two Christians of different nationalities are married (2 Cor. 6:14-18).
Richard Stevens, III