Oh, boo.
It turns out that chapter nine was authored by Faust. I happen to own his
and, in fact, have recommended it here in the past. Faust's views are introduced as follows:
The consensus today is that all previous suggestions have some truth regarding the origins of the ancient Israelites (Dever 1995a: 210-211; 2003; Finkelstein 1991: 57; Finkelstein and Na'aman 1994: 13; Kempinski 1995; Miller and Hates 1986: 85; Gottwald 1983: 6; 1992: 72; see also Rainey 2001; 75). In Finkelstein's words on Israel, 'the people who formed this entity came from diverse backgrounds -- groups of sedentarizing nomads, withdrawing urban elements, northern people, groups from the southern steppe, etc.", adding that a point of dispute is 'the ratios of the various groups in the Iron I population ...' (1991: 57). That is, while all may agree that there is some truth to all of the above, the percentage and weight given to each process varies. Most scholars that accept the core historicity of an Exodus (see below), agree that it is likely a very small group, but one thaht probably gave much of its history to the new group that emerged. Some other elements could be traced to other groups whose 'totemic/clan' name might always be a mystery to us (see also Dever 2003). [see Origins Reconsidered: In Focus, paragraph 6 - JS]
It's an excellent book; you should read it. You'll find nothing about the Exodus narrative reflecting an exodus from Babylon.
Stop blowing smoke. It's dishonest.