These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
That novel was actually produced by Toho to aide in the development of the film.
Complete Monster: Clark Nelson is an immoral businessman whose only concern is money. He has his men gun down innocent, peaceful villagers to kidnap the twin fairies they were protecting. He then has the fairies perform show after show as he enslaved them and kept them locked in a cage, even erecting a special glass around them to prevent them from communicating telepathically. He sends his men to kill the protagonists and when Mothra starts rampaging, he doesn't see it as his fault, flees from the country (gunning down a policeman along the way) and finally mocks the twins when it appears Mothra's been killed. His most vile action is the torture of a child who was trying to rescue the fairies.
Faux Symbolism: Mothra's a life-death-rebirth entity with a symbol resembling a shining cross.