If you look at real historical conspiracies, many only had a small number of individuals involved and were still exposed. Three can keep a secret if two of them are dead. In the case of these huge country wide or worldwide conspiracies the amount of people involved is too big for it to make any kind of plausible sense.
Just look at the irony of a "secret conspiracy" that everybody seems to have heard about. Of course this won't penetrate the minds of those people who want so desperately to believe in such things.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.