This YouTuber does a pretty good take on this story:
More: http://www.gurdjiefflegacy.org/60gine/pre_sand.htm
Gurdjieff - a remarkable man:
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Gurdjieff actually validates Sylvie's findings in her Egypt videos; saying that Christianity was exported in a ready-made form to Palestine from Egypt. But exactly what this Christianity was is another matter that we really know little about.
Gurdjieff said a few things, such as Christianity - before it had that name - was a "School of Repetition" i.e. the way it worked was that ordinary people once a month, once a year, or once every few years* would attend a temple (church) and hear *the story* of Creation, the way of proper living, and so on, and then *remember.* And then: repeat after some time. Repetition.
(* People had much better memory back then.)
Probably (I'd say definitely) there was also an Inner Circle to this religion, for those who wanted the more specific teachings for spiritual development. Jesus Christ may have practiced in a similar manner, with one "general" method for the big numbers of people, and then another more advanced method for his Inner Circle of disciples.
Gurdjieff also believed in the Atlantis legend and following his logic this religion that became Christianity, or the "School of Repetition," would have originated among the Atlanteans - who after their continent sunk established 1 colony in Egypt, 1 in Ethiopia and 1 or more in Eastern Asia. As I recall his stories.