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I realize Life Site is not a trad website, but man this is embarrassing. Did you see episode 520?
This is some weapons-grade retardation, right here. I don't know where to begin. A secret cardinalate? Let me guess ... Martin was one of them? 
And Martin was involved with the third secret of Fatima? Okay, then why didn't he publish what it says?
"Profound spiritual warfare encounters?" 
Prophetic warnings? Future crises? 
So, not publishing the Third Secret I can understand, if of course it's true at all. I do believe it's been verified that Martin was a secretary for Cardinal Bea, and the story is that Bea let him read the Secret. Of course, while pretending that he (and Bea) were among the "good guys" (with Bea allegedly complaining about Roncalli et al not acting on the Third Secret, even though Bea is likely a Mason), at another time Martin related a story in which he enjoyed blackmailing various bishops and Cardinals at Vatican II, and I doubt it was for good or noble purposes, i.e. to reject the heresis at Vatican II. So that's where Martin's BS starts contradicting itself. He's one of the secret good guys here, but then he admitted to being an agent of the bad guys. Which one, then?
I knew someone who followed Martin around on various lecture tours, and he told me that Martin would change up his narrative (in contradictory ways) depending on his audience.
At this point, I just don't know how much is true, how much BS, whether Martin was a bad guy or a good guy, or a bad guy converted into a good guy, or just a total fraud like Moran, where he was a nobody who knew next to nothing but then made a grifting career out of telling stories.