You can either control the population by myth-making about the past, which is what non-Western countries generally do, or by imposing a guilt complex on the population in order to prevent the population from ever challenging the government, most successfully implemented in Germany.

I think the second form is far better at controlling the population, because in the first form, people still have some self-respect, while in the second it's completely beaten out of them. Ergo, the increasing move of regimes towards the second form.