I call bullshit on this. Literally they are the generation who fostered war in Europe. Look at Brexit its the younger people defending peaceful and gradual unification, the older people want Britain to be "great again". We've learnt in a deep way post WWII not to repeat that. Look at the history of war in general and its happening way less often especially between countries, most is civil wars now. The loss of historic memory of old ill-will is more likely to enable further peace than hinder it.