The two-finger-I'm-so-holy hand gesture is an old mannerism of Catholic and Orthodox hierarchs. It's all over their Catholic paintings and scultures, and Greek Orthodox icons of, Jesus too.
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Here then, the holy gesture is adapted for use even by our very own GB members who are trying to appear most holy themselves.
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And here is how the new F* Pope made the two finger hand gesture.
You gotta love that guy even if he's the Pope.
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*(ehem, the F is for Francis).