There is no logic to any of this.
The very concept of "racial" human organization is European in origination.
"Whiteness" and its reactionary derivatives (including "Blackness") are complete manifestations of the system of white supremacy/European hegemony.
"Perhaps the first, unconscious stirrings of the concept of race arose within the Iberian peninsula. Following the Moorish conquest of Andalusia in the eighth century C.E., the Iberian Peninsula became the site of the greatest intermingling between Jewish, Christian, and Muslim believers. During and after their reconquista (reconquest) of the Muslim principalities in the peninsula, the Catholic Monarchs Isabel and Ferdinand sought to establish a uniformly Christian state by expelling first the Jews (in 1492) and then the Muslims (in 1502). But because large numbers of both groups converted to Christianity to avoid expulsion (and before this to avoid persecution), the monarchs distrusted the authenticity of these Jewish and Muslim conversos (converts).
So to ensure that only truly faithful Christians remained within the realm, the grand inquisitor Torquemada reformulated the Inquisition to inquire not just into defendants’ religious faith and practices but into their lineage. Only those who could demonstrate their ancestry to those Christians who resisted the Moorish invasion were secure in their status in the realm. Thus was born the idea of purity of blood (limpieza de sangre), not fully the biological concept of race but perhaps the first occidental use of blood heritage as a category of religio-political membership (Bernasconi and Lott 2000, vii; Hannaford 1996, 122–126; Frederickson 2002, 31–35).
The Iberian peninsula may also have witnessed the first stirrings of anti-black and anti-Native-American racism. Since this region was the first in Europe to utilize African slavery while gradually rejecting the enslavement of fellow European Christians, Iberian Christians may have come to associate blacks as physically and mentally suitable only for menial labor. In this they were influenced by Arab slave merchants, who assigned the worst tasks to their dark skinned slaves while assigning more complex labor to light or tawny-skinned slaves (Frederickson 2002, 29). The “discovery” of the New World by Iberian explorers also brought European Christians into contact with indigenous Americans for the first time. This resulted in the heated debate in Valladolid in 1550 between Bartolomé Las Casas and Gines de Sepúlveda over whether the Indians were by nature inferior and thus worthy of enslavement and conquest. Whether due to Las Casas’s victory over Sepúlveda, or due to the hierarchical character of Spanish Catholicism which did not require the dehumanization of other races in order to justify slavery, the Spanish empire did avoid the racialization of its conquered peoples and African slaves. Indeed, arguably it was the conflict between the Enlightenment ideals of universal freedom and equality versus the fact of the European enslavement of Africans and indigenous Americans that fostered the development of the idea of race (Blum 2002, 111–112; Hannaford 1996, 149–150).
"History of the concept of race":
Race (Stanford Encyclopedia of Philosophy)