Of the three sins listed, WHY would 'marrying outside one's race' be considered sinful? Because I kind of get the other ones even though I don't agree with sin as a concept.
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You could have someone who thinks races should be kept pure without thinking one is better than another. We see it in animal breeding. But even if it were a good idea that ship sailed long ago.
That’s not very accurate. First of all, people are not animals nor kept for breeding. This includes black people, who, in slavery were treated livestock and bred to maintain or increase supply.
Secondly, most animal breeders are indeed people who consider some breeds better than others , especially for their purposes. Within the breed, individuals are selected specifically for certain characteristics, with the desire to strengthen or compliment certain traits and to ‘breed out’ other characteristics.
Finally, the concept of race is a human invention, a construct invented to rank groups of people by the most easily discernible characteristics.