I saw that movie ages ago. Looks like the same Gorilla costume used on the Three Stooges and of course couldn't forget sexy B movie actress Claire Gordon
The idea of an entire religion surrounding the monster including the Mothra twin priestesses reminds of the natives that worshipped King Kong
I saw that movie on the Svengoolie TV show a few weeks ago on the MeTV Network There's really was no explanation for why the animal kingdom suddenly decides to turn on mankind, but if anyone deserves to go out that way its Ray Milland - what a mean bastard