The trillions of conspiracies in a collective hysteria
People in a mass hysteria aren't hysterical. The "illness" is at the mass, or collective, level. The whole network begins beating as one, with new notions of the righteous, new notions of the unclean out group, and so on.
And there are gazillions of individuals and groups coordinating to do authoritarian interventions. The overall synchronization at the network level relies on all that, just as firefly synchronization relies on gazillions of individual fireflies communicating and coordinating their flashing.
But in both cases no master planner is needed, and not even possible, to make these synchronizations happen.