Heritage and lineage are very important in Scripture as seen in the Old Testament. Thus there is the Levirate marriage law to continue a man’s family name.
Exodus 20:14 “Thou Shall not commit Adultery”
The word adultery has the additional meaning of adulteration, to mix in a lesser substance and miscegenation. This command is to protect the purity of the husband’s family lineage. The protection of young women, virgins, is for the same reason. The vast majority of scriptures concerning sex are about this aspect.
Now, no one seems to care or know they should. The family line is no longer sacred or protected. Your heritage and nation are given to other people.