Out-breeding depression primarily results in a decrease of fertility and infant mortality. So although it is occasionally observed in surviving offspring, in general it is much lower probability.
Also the neandertal crossing was deleterious it would be much lower percentage in modern humans. It also would not have come from multiple crossing events.






How can you not mention the awesome studies on bullshit.
https://jspp.psychopen.eu/index.php/jspp/article/download/6565/6565.pdf/
Conservatives fall for bullshit.