Clip taken from Arnold Schwarzenegger’s, Conan the Barbarian (1981)
In this scene we see the raiders of doom. Attacking Conans village.
This is one of the way old Europe could have ended. Please ignore the technological discrepancies and the theatrical acting. Pay attention instead on the village. Its open, no walls, people just minding their everyday rutine.
Now the war band. People of different ethnicity, I see semites, steppe people, (proto) Celts, Germans etc. They ride horses, hierarchical, armed, armor, standards, bloodthirsty. Crashing into the village killing everything that stands in the way.
Pay attention to Conans mother. Her only tough is her child, and she will do everything she can to protect him.
Is this old clip a plausible way on how Neolithic Europe ended? how the culture shift happen? please again ignore the technological anachronism and focus instead on the scene and what happen. Look at the surroundings.