The listed examples are conspiracies by the dictionary definition - "a group of people acting in harmony to a common, illegal end" - but I don't think they're t

The listed examples are conspiracies by the dictionary definition - "a group of people acting in harmony to a common, illegal end" - but I don't think they're the same thing the parent poster was referring to. Conspiracy theories generally revolve around some secret action by the government or other large organizations, not open slaughter. A better example might be COINTELPRO.