Well, your accounts and sources are lacking and will not stand up to other accounts of Israel's history. Like you said, how can you be so certain?
He can't 'cause all they have are hypothesis. He can’t even tell the difference between the Bronze age and the Iron age. He was so far out from the Bronze age that he started his twisted theory from the Iron age about the history of Israel. He should read Exodus to see the difference.
Here are some of their hypotheses or assumption.
“At some stage the oral traditions became part of the written tradition of the
Pentateuch; a majority of scholars believes this stage belongs to the Persian period, roughly 520–320 BCE.
[6]
The mechanisms by which this came about remain unknown,
[13]but there are currently two important hypotheses.
[14]
The first, called Persian Imperial authorisation, is that the post-Exilic community devised the Torah as a legal basis on which to function within the Persian Imperial system;
the second is that Pentateuch was written to provide the criteria for who would belong to the post Exilic Jewish community and to establish the power structures and relative positions of its various groups, notably the priesthood and the lay "elders". –Wiki
This is borderline anti-Semitism because if you follow this theory you won’t believe the other things they were saying about how the Israelites got their land inheritance from Abraham. This is what they were trying to do, discredit Abraham first and everything will follow their twisted theory about the Israelites. IOW, no Abraham, no inheritance, as simple as that. Do you think they are really interested about the History of the Israelites? NO! But William Foxwell Albright was.
William Foxwell Albright (May 24, 1891 – September 19, 1971)
[1] was an
Americanarchaeologist,
biblical scholar,
philologist, and expert on
ceramics.
From the early twentieth century until his death, he was the dean of biblical archaeologists and the acknowledged founder of the
Biblical archaeology movement. Most notably, coming from his own background in radical German historical criticism of the historicity of the Biblical accounts, Albright, through his seminal work in archaeology (and most notably his development of the standard pottery typology for Palestine and the Holy Land) arrived at the conclusion that the biblical accounts of Israelite history were,
contrary to the dominant German literary criticism of the day, largely accurate. -Wiki