As much as I understand the PC imperative of an Academic and his detestation of all things violent; and I know how wonderful is his theory that the ancients "likely interbred and evolved together" - "made love," as it were, it is more likely that the opposite occurred: They "made war" and the Cro-magnons wiped out the more dim-witted Neanderthals.
Academics never quite give up their agenda, even as it is contradicted by their own research.
Their entire research apparently consists of measuring skulls, which people laughed at the Nazis about.
I got the very same impression reading this article. It sounded like Kramer was "backing-in" his theory to conform with PC notions that are still alive and well in academia these days. There was an interesting documentary on the Discovery Channel a few months ago about Neanderthals and early Man and the consensus was that Man starved and hunted the Neanderthals out of existence. No professional field is safe from PC.