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Jay-Z is a freemason with a Satanic agenda ... in fact, he's executing a plan concocted by Lucifer himself, at least according to the man who is serving as a spiritual guide to "Two and a Half Men" star Angus T. Jones.

The man behind the theory is Christopher Hudson -- who is featured with Jones in the "testimonial" video where Angus trashes "Men" as "filth" that goes against his newfound religious ideology.

In the video, Jones says he discovered Hudson through his ForeRunner Chronicles video series -- in which Hudson spouts off about a variety of topics ... including:

-- Why he believes Jay-Z is a Freemason with ties to the devil

-- How Obama's pro-gay agenda has similarities to Hitler

-- How the NYC gas crisis can lead to cannibalism

In fact, Hudson warned his followers that the gas crisis can turn into a food crisis, forcing women to begin cannibalizing their own children -- "Your baby might start looking like a chicken wing."

So does Jones believe everything Hudson is preaching? It sure seems that way ... because during the "testimony" video, Angus praised Hudson, saying, "I love watching ForeRunner Chronicles ... all the information is so great."

He continued, "Your videos have no doubt been a blessing to me."