Exodus has long been considered to be mythical and historic evidence indicates that Judaism grew up in ancient Canaan; after the Babylonian captivity, a monotheistic religion grew out of a polytheistic one.
I think another related two points to all this are that the relatively new archeological evidence in Egypt about the life style of the builders which are supposedly accpeted as Jewish slaves.
1. Western archeologists think that all those astonishing amout of monuments weren't actually built by slave power contrary to the common belief.
They have found special sites built close to monuments for builders -who also built their own tombs for their own- and forensic anthropolgists found that bodies in the tombs had suffered typical injuries people in that occupation would have and what's crucial is that they have been treated very efficiently -which is fascinating if you think this happened more than 3000 years ago- and highly likley these people were treated special and had a health plan
designed for them. They also state that considering the majority of the population work in irrigation, working as a builder is a cushy job compared to a lot of other jobs in Ancient Egypt.
2. The more they reveal about Ancient Egypt; how its system actually worked, the picture changes in a rational outlook.
Ramses the 2nd, the likely candidate to be the Pharaoh of the Exodus didn't declare himself a god to compete with Jewish minority or for just kicks and giggles. As always, there is a bigger functional political real life agenda to keep the balance of this incredible scale of an Empire and its system.
Pharaohs have an identity as a ruler that is consisted of two parts. One, the defender of the Empire; the militarist hero to wipe out the enemies and the dangers that threaten Egypt. The second one is their divine personality that is connected to gods. So one foot in this world, the other foot is on the other side.
As Egypt in his period was a super power, Ramses 2 'runs out of enemies' to support his defender status; keep it as an active power and his reputation gets in to jeopardy as a ruler. So he decides to embrace the other one fully to save the earthly one that failed. He declares himself god and has a temple built to show himself as equal to other Egyptian gods; Abu Simbel.
It's a genius political construct, esp. considering that Egyptian religion is a funeral cult. The scale of the Empire, its power and what's at stake. And as always has little to do with religion itself.
But this came to be considered as a part of an Exodus story, just a means to subjugate a certain slave population by challeneging its god, while there is an enormous empire to direct and maintain as if Jews of the time had a different culture than the main cult.
So highly likely Exodus was made up much later as a complicated parable-root story to isolate the tribe from outer influence and keep it together. Again, a good clever political agenda and the practical usage of religious fairy tales that have survived for thousands of years AND STILL functional today. Well played. And has little to do with religion itself, more like constructing an identity of a tribe.