Neanderthals vs humans

http://www.sciencedaily.com/releases/2006/01/060118210756.htm
(Neanderthals Were As Good At Hunting As Early Modern Humans.)

There has been much theorizing about what caused the extinction of Neanderthals. One possibility (?probability) I have seen mentioned is that early humans killed them off because they were simply more violent. Now, I'm sure I can't be the only person who has considered that possiblity, but nobody else seems to want to admit it.