That is what I mean by coordinated. Group on group violence. Presumably there were interpersonal conflicts over such an immense period of time, and we have evidence of individuals potentially being injured by artifacts, which could be accidental or intentional, but we don't find anything like signs of a struggle at an inhabited cave or post battle burial pit or stolen artifacts that would be loot, or attempts at creating defenses like fortifications or armor, or cave paintings depicting battles, or signs of a culture that valued warriors. There is no evidence of any coordinated conflicts at all, nonetheless a specific Sapien vs Neanderthal conflict. We only see evidence for such conflicts in the neolithic after people adopted sedentary lifestyles and territory would be defended.
It's further worth noting that in observations of modern hunter gatherer societies, interpersonal violence is common but group violence is basically non-existent. The idea of savages killing the men and stealing the women of neighboring tribes is a myth. Again, there is no evidence to suggest that things were substantially different then.
> Two examples refutes your assertion. In the US/Canada/Australia, the natives won a few and yet the male native lineage has been effectively wiped out. Almost all the interbreeding between the europeans and natives was between european males and native females. Mexico is another example. About 65% of the male Y chromosome is european while almost 100% of the female lineage is native. Mexico never experienced whole mass european immigration like the US, Canada or Australia. With only a tiny spanish population, over 400 years, the spanish male lineage has come to dominate mexico.
Those examples do not refute the assertion. For starters, Native American Y-chromosomes come from many haplogroups and are predominantly not european in origin, so your claim is just incorrect on the face. Second, we know for a fact that Homo Sapiens came to europe for several thousand years and then died out. The Neanderthals didn't just get a few licks in, they won overall. Yet we have no evidence of any male neanderthal ever fathering a child with a sapien female. Finally, the europeans didn't murder all the men and rape all the women in the americas; while Europe gained polical hegemony and did numerous terrible things, there were numerous alliances with various native polities, and the overwhelming majority of the Americas' depopulation was due to disease.
> Except that modern homo-sapiens completely displaced the neanderthals. If it was simply a matter of innocent hybridization, neanderthals would still exist as they breed better with each other than hybrids do. Not to mention most animals have an innate aversion to hybridization. It only tends to happen as a last resort in the wild.
I don't understand what you are trying to argue here. Sapiens having difficulty producing fertile offspring with Neanderthals would make it more likely that Neanderthals die out, not keep them around. And given that this interbreeding was happening rarely over the course of thousands of years as Neanderthals were going extinct, hybridizing as a last resort is a very likely explanation for the pairings.