not sure if you'll answer so,,,,,ad70 to ad150 is 80 years after the destruction of the temple. It's estimated that Josephus finished around ad95-96 . So ad95-96 to the birth of COA is 55 years. is there someone else you know of that taught perterism in those 55 years?
Why those 55 years?
Why not go back even further.
Ignatius Theophorus said the following before Josephus:
"It is absurd to speak of Jesus Christ with the tongue, and to cherish in the mind a Judaism which has now come to an end. For where there is Christianity there cannot be Judaism. For Christ is one, in whom every nation that believes, and every tongue that confesses, is gathered unto God.” - The Epistle of Ignatius to the Magnesians, Chapter 10
Have you noticed that we keep going further, and further back, and keep finding someone older than the previous person who preached Preterism?
We're almost back to 70AD.
Do you want to keep going? This is kinda fun.