It seems pretty obvious to me that this was the Kayeen's actions being misunderstood as the action of God. It's really indispensable theology now if it's understood correctly but that's only because we've had a few centuries with Jesus's revisions and corrections to develop it into a concept of Original Sin.

This passage, along with Deuteronomy 6:4, is one of those unfortunate reasons the Gnostics thought YHWH was the cosmic Demiurge pretending to be the Supreme Being. The Gnostic Demiurge is sort of like a "devil" figure combined into an inferior "creator" that creates the material universe as a trap to keep souls to be enslaved to him to serve his ego. The Gnostics, unfortunately, applied this idea to YHWH and assumed this jealousy is because we became sapient beings that are aware of logic which eventually can reconnect us to the higher goddess Sophia who works with Jesus to liberate us from the trap.

As Christians we understand this a bit differently. The surface level of this is taken as a lesson to remind us our alienation from God due to imperfect natures and the tendency to elevate imperfect desires to a pedestal of absolute truth which generates a hereditary condition of Original Sin that necessitates God's mercy to reconcile us to Himself. This encourages us to repent of errors and act with humility when approaching God and ultimately culminates in His Son taking that burden upon Himself to save us from sin via the promise given and to free us to embrace the Almighty Father's love.

I suspect, if I read this in terms of RD's statements, there's some more buried in this whole thing. The first chapter is a summary of the creation presented in terms of the workman's week. Young Earth Creationists stupidly interpret this as a literal timeframe rather than a figurative comparison. This was probably a holdover from what the pre-flood workmen were taught about time and creation by the Kayeen engineers.

In the literal sense, I suspect these words in Genesis 3:22 were just from the Kayeen leaders. Probably after the human slaves broke containment at some point and rediscovered independent thought. These humans probably saw it as Paradise crumbing. The Kayeen's concern was obviously cleaning up the mess.

Cain represented the "industrial" societies that had been established in service to the Kayeen. Abel represented those who had gone "off grid" to avoid their Kayeen masters. These societies led by the "Nephilim" were really the supersolider hybrids that served as Kayeen generals. The Flood was, of course, RD's people delivering the huge FU to the Kayeen in the form of the Younger Dryas comet. This also spawned the Sumerian legends about Enki and Enlil contesting over humanity.

I think this first part indicates that early people had a hard time distinguishing the Supreme Being from the advanced races. That whole "plural of majesty" for God existed because they weren't sure if God was one or many. Over time a Supreme Being concept started to evolve out of observing the "ael." This is evidenced by the Semitic choice of El as the Supreme God before the term YHWH/Ehyeh filled this title. Abraham probably was the first to really reject the Hindu paradigm of seeing all gods as emanations and focus on a single God to represent reality itself. I presume the Naigaje built upon this idea and later corrected Moses/Akhenaten during the exile from Egypt with the name of God as they worshiped Him. The later YHWH-ist redactors injected His Name into that passage to retrofit it into a monolatrist tradition. Of course, they weren't pure monotheists but saw YHWH having a consort in Asherah. Eventually this was recodified into a harder form of monotheism through Deuteronomy 6:4 during the reforms of Hezekiah. Thus before and during the Babylonian Exile the beginnings of Judaism as we now know it really occurred.