Neither of which involve an alleged conspiracy. I must say that I find the word “conspiracy theory” to have rather odd usage in common parlance that does not seem to have much to do with conspiracies but I'm not sure what the actual definition is either. If anything, perhaps it's actual semantics are little more than “allegations of wrongdoing the speaker considers to be false”.
Killing a dozen people by shooting up a bus station is national news. Killing millions, year in and year out, slowly enough, is just business.