A very good presentation, or theory, was presented by Eric Jon Phelps in his book Vatican Assassins in that the Vatican assisted those partaking in the Yalta Conference, which ended with the majority of their ideological enemies, stemming from the Reformation, to fall under Communist Rule thus elimination and Religous oppression...
A very good thesis and theory. Plausable and highly possible in this defunct age of insanity and evilness...