Many of us argue against race-mixing, or miscegenation, on the basis of the obvious point that it is genocide. If you mix an ethnic group, you replace the original group with something else.
Proof of this comes from recent events where miscegenation equals degeneration as traits are lost:
Black Students United takes issue with the fact that there are more African and Caribbean students on campus when compared to black students. The group defines black students as those who come from black families that have lived in America for two or more generations. While the group said it doesn’t mind the university trying to recruit African students, they want the college to pay more attention to black students whose families have been affected by years of white supremacy.
Anecdotally, African immigrants achieve more than African-Americans, and this presents a problem. Why could this be? We might say that those who were subjected to slavery were from lower castes, or at least captured in warfare. We could say that those who are coming over are of a higher caste.
Or we could point out that many African-Americans are a quarter Caucasian, meaning that they are of mixed race.
In theory, if we believe the superior/inferior doctrine of races, this would improve them. But much as mixing different chemicals can produce a muddle, mixing races will destroy both.
Consider this. There are several thousand genes that code for intelligence. Remove some, and the effect is lost. This is true of most traits; they are the result of a combination of many genes.
When you breed people who are of the same race, ethnic group and caste, those genes exist in common, so the traits are passed on. But when you mix race, ethnicity or caste, then some of those thousands of genes are not passed on, and the trait is lost or only partially passed on. This results in people without the original ability or worse, the appearance of the original with less competence.
In this way, mixing an African and a Caucasian loses what each does well. This could explain the average relatively lower performance of African-Americans. Not only do they suffer from having been the type of people within their race who were likely to be enslaved, and the consequences of slavery and living in the ‘hood, but they have also been deprived of their genetic birthright.
By the same token, this shows us why mixing ethnic groups within a race is so destructive. When you mix a German with an Irishman, you get neither a German nor an Irishman, but something else. Those unique networks of genes coding for traits are lost, and with them, whatever made each group great is lost. Instead you get a person of generic abilities like the incompetents now flooding the West.
After several centuries of denying race, ethnicity and caste, the West is awakening to its importance. Mixing any of these elements produces lesser-quality human beings, independent of whatever linear considerations we apply to each race. Diversity is death, and miscegenation is worse. The new world we inherit will place a much higher priority on this concern.