Race goes much further than the color of someone’s skin. The Genetics of the White races and the Negro races are much different. One of the most important things is the average brain size of a White is much larger than that of an average Negro. This makes a big difference in how well someone can perform in a civilized society.

Whites have always been the creators of civilizations and inventions.

Blacks have literally never made it above the mud hut. They are also the only race that never invented the wheel.
The average pure Negro IQ is just below 70.
The average pure white IQ is well above 100.

I can do on and on.

The bible states in many places that race mixing is a sin. Even " You shall not commit adultery" is in the Ten Commandments. To adulterate means to make impure. It does not mean don't cheat on your wife. That is already in there "You shall not covet your neighbour’s house; you shall not covet your neighbour’s wife, or male or female slave, or ox, or donkey, or anything that belongs to your neighbour.”.

Race mixing ruins a person’s genetics that took many 10s of thousands of years to create. The resulting offspring will bring down your society as a whole.