The 'Thals were crowding onto the Iberian Peninsula, encompassed on all sides by a race of men who seemed to have only one purpose in life above all other things - to exterminate them.
No woman or child who died by violence has ever been documented in a properly established Neanderthal living habitat. Contrary to what you may have heard, cannibalism has never been firmly established amongst them, ever. Nor has regular tribal warfare or trepass by Neanderthals into the territory of others.
Weird things are going on right now as well.