Killing of aborigines/indigenous people did not take any theories for them. The genocides were more religion based (eg monotheism considered superior to polytheism/paganism/animism) than scientific (that is, the raison d'etre given being need to weed out inferior beings per se).african origin hypothesis was born at the peak of European racism , any one had a non-white tone was inferior by de-facto, it provided them the necessary reason to conduct genocide wherever possible, they used these same theories to create artificial famines in southern India as well during 1840-1880s which killed 30 million people, it got toned down after ww2 waiting to burst again when given a chance
the recent corroborations with DNA markers are not acceptable when the knowledge and origin of influential pattern of DNA is not clear,
humans feudal instincts always or at-least until now triumphs their intellect
I have not idea about artificial famines limited to South India.
Are the haplotype based migration unacceptable because they corroborate earlier theories? Or because the method itself is thought faulty?