A new study of fish remains deepens scholars’ understanding of how the dietary laws came to be.
1, The scholars have apparently not interacted with the doc THE MOSES CONTROVERSY. The things shown there have squared much closer to the Biblical chronology than they think possible. Even on the question of the origin of Hebrew alphabet and writing.
2, no connection was made between the failure to keep kosher and the captivities. So it is not that the Biblical narrative is mistaken, but that there seems to be some inattention to what was its cause. Ezekiel and Zechariah especially are concerned about dietary law. This still allows for a resurgence in interest (as found) in the Maccabean period forward when 'clean' vs. 'unclean' food becomes a great issue right on through to Peter's meal in Acts 10-11.