That last word, "unbelievers" is of key importance. A Christian should not marry a non-Christian no matter how kind and good they are. What about interracial marriage? Deuteronomy tells the Israelites to destroy all the inhabitants of the Canaan land and not to intermarry with them because they would "turn your sons away from following Me, that they may serve other gods.
Here's the short answer: nothing in the New Testament prohibits interracial marriage. Christians are at liberty to marry whomever they wish--as long as the other person is also a Christian 1 Corinthians The Old Testament contained some restrictions on whom the Israelites could marry. These were meant to protect the people of God from pagan influences Deut.
What does the Bible say about interracial marriage?
Surprisingly, perhaps, this can include concerns about the idea of marriage between two believers from different so-called races. But these concerns have no basis in either science or the Bible. Evolutionary thinking has, historically, exacerbated racism dramatically.
Some people insist that the Bible meant for the races to remain pure, therefore prohibiting any kind of interracial marriage. Usually two biblical texts are drawn upon to support that view. One is the fact that Noah had three sons, Shem, Ham, and Japheth. As you recall, Shem received a patriarchal blessing, and an enlargement of that was given to Japheth. Some have neatly contrived from the three sons of Noah, three survivors of the flood, that this is the historic basis for the three basic generic types of human beings: the Caucasian, the Negroid, and the Mongoloid.