Allegedly, the guy had no idea how he came to be in Mexico City. He shared information that there is no rational way he could have had, and it was later collaborated by others.
He was arrested and accused of witchcraft - I've never read of anyone believing him until his story was confirmed months after the fact.
Then he just... disappears into history.
I wouldn't say I believe the story, but if a guy was actually suddenly transported around the world, the events in the story are about what I'd expect the reactions to be.
I've self-identified as an AnCap for well almost twenty years at this point.