Understanding of DNA has obviously progressed a great deal since some of us were taught the basics at school many years ago. I am happy to accept that Western European hunter-gatherers had dark skin and pale eyes. And I suspect that while some of them would have stayed in the little communities where they were born, others would have travelled to distant lands, and mixed their genes with some of the people they found there - even people of different human species such as Neanderthals.
I have often wondered whether those other species are the origins of our ancient tales about goblins and ogres and gnomes.