For example, Bernardo, the website pushes a view of Neandertals as cannibals and rapists, with H. sapiens it’s victim.
First, there is virtually no evidence of sexual intercourse between H. sapiens and Neandertals in the palaeoanthropological and genetic record. The Lagar Velho child from Portugal has been proposed to represent a hybrid, but that is far from established, and as such it is alone. There isn’t any clear sign of Neandertal genetic contribution to us either. In other words: there is no evidence of Neandertals regularly raping H. sapiens. In fact, there is no clear evidence they were ever in the same region at the same time. The truth is that direct contacts between Neandertals and H. sapiens might have been very sparse.
The same goes for cannibalism. Yes, there are a few instances of Neandertal cannibalism: but they are few. Basically, it concerns 3 sites out of thousands spread over Europe and the Near East, and 3 instances in over 200 000 years of Neandertal prehistory. In other words: there is no evidence that cannibalism was a omnipresent, common part of Neandertal subsistence behaviour. In fact, we have orders of a magnitude more evidence for cannibalism by H. sapiens over the past 30 000 years, than we have for Neandertals over 200 000 years. So again, there really isn’t a strong argument possible to mark Neandertals as ferocious, habitual cannibals, instead of us (if we go by the archaeological evidence, then we would be the species with cannibalistic tendencies!).
I would like to note here that, yes, there is evidence of a strong meat intake by Neandertals from stable isotope studies of their bones and teeth. But both paleontological evidence (butchered bone remains) and the isotope evidence itself suggest the source of the meat were herbivores. Again, there is no evidence that they habitually hunted and ate “us"or even their fellow Neandertals.
So, there we have the two things that apparently form the main core of the hypothesis in the book: and from my expert knowledge of the palaeolithic record in question, I can already judge them to be spurious.
More-over, they hark back to old stereotypes, when it comes to branding “them” with regard to “us”, in a xenophobic sense. Cannibalism and rape are two of the three big taboos (the other is incest). As such, it are powerful icons employed when one want’s to dehumanize a particular group.