This isn't as far-fetched as it sounds.
As far as I'm aware, the first monotheistic religion arose around 1340 BC in ancient Egypt. Around that time the 18th dynasty's "heretic pharoah" Akhenaten changed Egypt's religion, with its vast and colourful panoply of deities, to worship solely of the Aten, or solar disc. However, soon after Akhenaten died, Egypt reverted to its ancient religious practices.
Now go forward fifty to a hundred years or so. Egypt's empire has just about reached its zenith, under two of its greatest rulers - the early 19th dynasty pharoahs, Seti I, followed by his son Ramses II. Egypt's polytheistic culture is largely as it's been for centuries and Akhenaten and his new religion are officially forgotten.
However, this appears to be about the time when the exodus of the Hebrews from Egypt on their journey to Israel began. It's interesting that just a couple of generations after Egypt's religious upheaval, another monotheistic religion comes to prominence and I can't help but wonder if it's just coincidence...