A brief look at the very Haaretz page you link to shows you're entirely misrepresenting your book. Adler is arguing that what happened late is not the origins of Judaism but when it became common.

"This would suggest that Judaism as we know it became a mass religion relatively late ... “It is possible that the principles of Judaism were much older, that the texts that became scripture were much older, but I am asking here what were people doing,” Adler says."

This was also published basically moments ago so it's yet to see whether this thesis will be accepted. But I'm curious, does this thesis actually suggest anything not clear from the biblical texts itself about the preponderance of pagan sectors of ancient Judea?