-My premise is, That because "white" and "black" people can reproduce, and have for ages without a history of abnormalities, that nature isn't fighting it, but perhaps encouraging it. The fact that the two are attracted to each other is a natural process, encouraged by nature, as nature has a way of causing us to reproduce. So, is your premise that it's wrong for them to reproduce?"

Has been fighting it and continues to fight it...

"The majority of DE male lines can be categorized as being in either Haplogroup D (Y-DNA), which likely originated in Asia, the only place where it has been found,[1] or haplogroup E, which is believed to have originated in East Africa[2][5] or the Near East.[3] The remainder are said to be in the paragroup DE*, confirmed cases of which are extremely rare.

In a study of over 8000 men worldwide including 1247 Nigerians, Haplogroup DE* was observed in only 5 Nigerian males (5/1247). However, the study's authors caution that "the apparently paraphyletic status of this haplogroup, and hence the conclusions of nested cladistic analysis, are also likely to be illusory" and that "the only genealogically meaningful definition of the age of a clade is the time to its most recent common ancestor, but only if DE* is paraphyletic does it also become automatically older than D or E in this sense."[6] More recently, one example of DE* was found amongst the Nalu in Guinea Bissau (1/17). The DE* sequence of this individual differs by one mutation from the DE* sequence of the Nigerian individuals. This indicates common ancestry, though the phylogenetic relationship between the two lineages was not determined in this particular study.[7] A 2008 study detected DE* in two individuals from Tibet (2/594).[8]
Haplogroup DE is found in Africa(Haplogroups E and DE*) and East Asia(Haplogroups D and DE*) but is largely absent in between these two regions. The presence of DE across widely separated regions has confounded investigators trying to reconstruct the migration of humans from Africa to Asia. At some time, there was an extinction of DE lineages in West, South and Central Asia. Autochthonous DE lineages are absent in India, an important region in the dispersal of humans in Asia. However DE lineages have been detected in relict populations of the Andaman Islands. Underhill et al. 2007, suggest the possibility that deleterious mutations in some DE carriers may explain the extinction of DE lineages in India."