Class struggle is feared by the ruling class. A riot causes much more than the damage to property. It damages the carefully pruned image of the democratic system and gives average people a taste of their own power. Television no longer seems to be taking everyone's interests into account. Class struggle is the only thing that can change the unofficial balance of power in the modern world.
Class struggle can stop a war.
But it is not automatically created by a war. The Vietnam Syndrome is a myth that has been repeated by the media for twenty years. Another Vietnam would have made the ruling class squirm but this hardly the meaning of the Vietnam Syndrome. This buzzword refers to America's supposed squeamishness at fighting a war with many American dead. The Vietnam war was a failure for the America elite.