The generational split and the nostalgia of 'the good-ol'-days' stem from the inability of the older generation to perceive that the ideologies have altered and the impotence to comprehend the new ones, which then triggers the automatic assault on the 'new ways’, as those threaten preexisting existential projects by mere prevalence. 
At least in the industrialised versus peasant societies, where skills are transferred gen by gen and improved without a necessary shift in ideology.

In fact things and actions performed may remain identical, but a novel approach or the demeanour they are performed in alone, can cause ideological discomfort and thus contempt towards the coming of 'fresh blood'.