How would they know that? Did you know that actually Moses is a Egyptian name? That there are several Levi's with Egyptian names in the Bible? And only Levi's have Egyptian names? This is part of the evidence that here was an actual exodus from Egypt but it involved only they who are known as Levi's. It's in a book called "The Exodus" by Richard Elliot Friedman. There were much fewer than the numbers claimed in Exodus which helps explain why there is no physical evidence or records of the Exodus. I don't believe in the 10 plagues either. That definitely would have been recorded.
From Wikipedia:
In his 2017 book
The Exodus: How It Happened and Why It Matters, Friedman argues that
the Exodus involved only a few thousand of people, who left Egypt during the reign of either Pharaoh
Ramesses II or his son, Pharaoh
Merneptah.
This group later merged with the Israelites, introducing the cult of
Yahweh in Caanan, together with the idea of
monotheism/
monolatry, possibly inspired by the religious reforms of Pharaoh
Akhenaten. Once in Israel, Yahweh's cult supplanted the cult of the Caananite god
El, and the two gods became one and the same in Israelite religious mentality. This group of migrants would later form the
Tribe of Levi.
The name Yahweh, according to Friedman, was probably inspired by the
Shasu deity Yhw, whose presence is attested by two Egyptian texts from the time of Pharaos
Amenhotep III (14th century BCE) and
Ramesses II (13th century BCE).
Friedman also rejects the idea that Jewish monotheism was born during the
Babylonian captivity (see
Deutero-Isaiah) and argues that the concept of monotheism/monolatry was present in the Israelite people since the 12th century BCE, although for many centuries it met strong resistance from polytheistic sectors of Israel.
[8]
The book received positive reviews from several biblical scholars and archaeologists like
Thomas Römer,
Carol Meyers and
Thomas E. Levy and from publications like
Publishers Weekly,
The Christian Century and
The Jewish Journal.
[9]
This also implies that the conquering of Canaan never happened, or the genocide that supposedly occurred.