I’ve heard the term, “keystone,” used before. The first time was several months ago. It didn’t seem to “fit,” anywhere, so I left it alone.
The term in the original context, I received was in reference to PA. This was prior to the Priests being arrested in PA.
I looked into the XL Keystone Pipeline, which also, (to me) seems unrelated.
A Keystone is a capstone. See related pic.
(((Their))) symbolism will be their downfall.
I still think “keystone” is connected to PA, somehow, but I’d like to bring another “Keystone” to light. This is a global business strategy organization / think tank / R&D. Note their corporate affiliations.
One of the main locations for Keystone is in Boston, MA located inside the New England Power Building.
https://www.keystonestrategy.com/our-work/