There is nothing unScriptural about interracial marriage...
I'm not even sure the subject comes up in the Scriptures at all.
There is a ban on marrying outside of your faith... but that has nothing to do with interracial marriage.
God only created one race... He called that race "mankind".
The only requirement God ever gave for anyone to become an Israelite was that they had to "convert" to the worship of the true God and leave all the pagan, heathen stuff behind. By the way, one of the greatest men that ever lived married interracially...
Exo 14:31 And Israel saw that great work which the LORD did upon the Egyptians: and the people feared the LORD, and believed the LORD, and his servant Moses.
Exo 33:11 And the LORD spake unto Moses face to face, as a man speaketh unto his friend. And he turned again into the camp: but his servant Joshua, the son of Nun, a young man, departed not out of the tabernacle.
Num 12:1 And Miriam and Aaron spake against Moses because of the Ethiopian woman whom he had married: for he had married an Ethiopian woman.
Num 12:2 And they said, Hath the LORD indeed spoken only by Moses? hath he not spoken also by us? And the LORD heard it.
Num 12:3 (Now the man Moses was very meek, above all the men which were upon the face of the earth.)
Num 12:4 And the LORD spake suddenly unto Moses, and unto Aaron, and unto Miriam, Come out ye three unto the tabernacle of the congregation. And they three came out.
Num 12:5 And the LORD came down in the pillar of the cloud, and stood in the door of the tabernacle, and called Aaron and Miriam: and they both came forth.
Num 12:6 And he said, Hear now my words: If there be a prophet among you, I the LORD will make myself known unto him in a vision, and will speak unto him in a dream.
Num 12:7
My servant Moses is not so, who is faithful in all mine house.
Num 12:8
With him will I speak mouth to mouth, even apparently, and not in dark speeches; and the similitude of the LORD shall he behold: wherefore then were ye not afraid to speak against my servant Moses?
Num 12:9 And the anger of the LORD was kindled against them; and he departed.
Num 12:10 And the cloud departed from off the tabernacle; and, behold, Miriam became leprous, white as snow: and Aaron looked upon Miriam, and, behold, she was leprous.
Sound like God was unhappy with Moses for marrying an Ethiopian woman?