No hard facts, but could these results not follow from the life these kids had during and after those events? Not because their parents happen to have been in them for a time. The depression lasted during their early years and results of war will last into their early childhood (etc for other traumatic lasting events), with all the effects this had on their new parents, surroundings and society. Their upbringing/'indoctrination' would have probably changed from their parents' for example (edit typo)