> The most amazing change in relationships happened between France and Germany.
I think we tend to forget that wars are started by governments, not people. People usually have no hatred for people beyond their borders. Hatred is created through politics and brainwashing.
Nope, personal experience can lead to hate in individuals, or questioning their hate. People form opinions based on the examples they see. If the examples are bad, there is no need for any propaganda to instigate hate.
> To start a war government needs the support from a significant part of the people
There's a bunch of recent wars that had virtually no widespread popular support. Vietnam, Iraq, Syria... it does not seem to be a necessary condition anymore for any military action.
I think we tend to forget that wars are started by governments, not people. People usually have no hatred for people beyond their borders. Hatred is created through politics and brainwashing.