I think Prof. Adler is stating what has been known for some time. Whenever weighing the historical usefulness of ancient writings, it's necessary to recall that winners wrote it. What we can be pretty sure of is the primary history of the Jewish faith was a 're-creation' of the deep past using ancient diverse traditions mixed with religious idealism of the 6th century BCE then further revised and reinterpreted during the Hasmonean period. Later Rabbis developed the concept of a mythic Great Assembly, (led by the last of the prophets), that defined and even rewrote the OT (Tanakh) during those years to, IMO, give authority to these revisions recognized by careful readers.
The 'winners' that eventually defined Judaism after 70/135 spawned from the Pharisee sect, and with them came the Tanakh and Torah. Most of the other Jews becoming absorbed into them or other sects such as the diverse forms of Christianity that disavowed the Torah. Those were largely the choices.
His comments about the coins must be regarded as another evidence the Gospel narrative dates to post 70.