Kind of reminds me of the novel, 'Clan of The Cave Bear'. The novel depicts the Neandratal as more emotionaly advanced and peceful. Then the skinny, nasty H. Sapiens come along and brutalize them calling them "flatheads" and somesuch.
I dunno if this is true and not just a reflection of our nature as humans. Though, I see no reason to belive Neandratal couldn't be just as mean and nasty.