What are followers of the Unification Church nicknamed?

The first option would be more appropriate

aqualung, that would cause confusion with far too many other "religions".

King Inanyu & aqualung, One persons mythology is anothers religion/ faith/ beliefs, & vice versa. Equally the same. Sanity to one is crazy to another. To each their own.

I bet they get called loonies more often than not.

Depends how polite you are.

Second option is alright by me too