it's a very interesting show, and even as a christian I am very open to it.
But the op is correct. The show basically says EVERYTHING THAT HAS EVER HAPPENED EVER IN THE HISTORY OF EVERNESS IS ALL BECAUSE OF ALIENS.
Literally. EVERYTHING.

Invention of Swords? Aliens. (dead serious)

A legendary sword that was really sharp? Aliens. (I am being serious)
Invention of the bent sword, instead of the generic broadsword? Aliens. (literally)

A japanese hill that is known for being a place many people go to commit suicide? Aliens. (stop laughing)

Any belief system that has absolutely anything to do with "a" God? Obviously aliens.
(I understand some belief systems could be based of ancient astronauts. But ancient aliens says ANY RELIGION ANYWHERE is obviously be based off aliens)

Large ancient statue or structure? Aliens built it. (again, some ancient structures may really have been built by aliens. such as the pyramids ect... but not all buildings were built by aliens)