So could they be like some monoliths of abbadon, left behind by the margonites, or something unrelated?
Must say, I am amused by the last paragraph, that, just gonna make people range more, you should have just cut it completely.
Especially this part:
The prophets of the krait are false religious figures invented by a ruling priest caste to maintain their control. No part of the krait culture or religion is based on, or intended to resemble, any real-world parallel.
Thats a no go.
A large numer of priest of real-world faiths will assure you, that the preists of an opposite real-world faith are exactly how you describe the krait, or just missguided/misslead by the evil/trickery deity of their choice.
Seriously, don't even mention any real life stuff. You can only loose.