I don't know if there's a name for it but there's got to be one because this pattern shows up often in evolution - some behavior / program is destructive in the absence of another evolved system that keeps the first in check - both present? no problem. Lose one, big problem.
Jews really are high IQ and can be great doctors and engineers and have fit into western civ without the current problems in the past when it was healthier. Civilizational weakness brings out all kinds of pathologies.