I'm not an expert, so just guessing, but I imagine it's something similar to the whole Arian stuff from the Nazis, ie: "look, our genes are more closely related

I'm not an expert, so just guessing, but I imagine it's something similar to the whole Arian stuff from the Nazis, ie: "look, our genes are more closely related to the most 'original' and 'pure' human lineage".