It’s not extraterrestrial, it’s interdimensional.

Humans have wondered about the stars since forever. That is understandable; they are beautiful and mysterious, as out of reach as mountain peaks. And perhaps for the same reasons, the earliest speculation about the stars revolved around gods, not extraterrestrials.

As with mountains, humans have associated stars with deities since the beginning of human history. Three of the most important gods in the ancient Near East, from Sumer to Israel and its neighbors, were the sun, moon, and the planet Venus.

Yahweh not only recognized that the nations worshiped these small-G gods, He allotted the nations to them as their inheritance—punishment for the Tower of Babel incident.
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In other words, God placed the nations of the world under small-G “gods” represented by the sun, moon, and stars, but He reserved Israel for Himself. The descendants of Abraham, Isaac, and Jacob were to remain faithful to Yahweh alone, and through Israel He would bring forth a Savior.

But the gods Yahweh allotted to the nations went rogue. That earned them a death sentence.
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Humanity has looked to the stars as gods for at least the last 5,000 years. End times prophecy, from the perspective of pagans, is about the return of the old gods, spirits defined as rebel angels and demons by the Hebrew prophets and apostles.

The Infernal Council has been playing an exceptionally long game. Once upon a time, Christians generally held a biblical worldview. The influence of the spirit realm on our lives was not perfectly understood, but at least it was acknowledged.
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In our modern, enlightened age, however, the principalities and powers have nudged and prodded humanity through the Enlightenment and Modernism into Postmodernism, shifting us from a supernatural worldview to one that only accepts an external creator in the form of “ancient aliens,” which allows us to account for the supernatural while simultaneously denying the existence of God.