It's Not the Stone Age Any More
The latest excuse for anti-immigration hysteria is that there's genetic evidence for many examples of one population's males replacing another population's males (typical example here). I can think of several counter arguments.
- It's not the Stone Age any more. It's not even the Bronze Age. This sort of “kill the men and rape the women” warfare has been much rarer since the spread of iron weapons.
- Many of the people propounding this theory appear to be on the Right wing … but are ignoring the anti-gun control implications of their ideas.
- Binational states are notoriously unstable. Sometimes you can get away with bribing the leaders of the minority side but that's rare. Multinational states are more likely to be stable. Back during the invasions in question, we saw two ethnic groups interacting at a time.
- We also see a similar pattern in a population that was not in a position to do much slaughtering.
One final comment: This is why you must not ignore racists. If you ignore or “no-platform” them, they will spread their ideas anyway but you won't hear of them until some nutcase shoots a few dozen people. If you listen to them, they can be refuted.