[Méo]

The level of hatred, anger, malice and racist poison that front line troops are covertly encouraged to vent on the enemy is all part of the technique to make them an obedient killing machine. Before US was born, the psychological training for warfare used the idea of a common enemy, presented by the media (church and educators then) as a direct risk to their families' security. However, history later reveals they fought for the welfare of the elite protecting their international trade routes

This.

Once again: War. War never changes.

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Edit: @Foxtrot

Thanks for sharing.