I studied on this a bit. There are protocols that need to be followed for an itinerant rabbi to preach in a synagogue. Submittable in writing, and what not, for approval... This was to permit the 'home team' time to formulate correction for 'right teaching' and debate. Probably somewhere in the Talmud, I bet...
This is one of the reasons I regard an original Hebrew Gospel to be almost critically necessary, and something like Hebrews too, as 'work product', as you say. Maybe some archaeologist will dig up some transparencies or a powerpoint presentation... some CDs out in the entrance... Then we'll know.
Ping to 59.
As for rabbinic protocols, I am not aware that Polycarp was Jewish, and I have seen (unsourced) statements he was gentile. I have no reason to believe at this point that said rabbinic protocols were being observed, and so I don’t see why this should infer a Hebrew NT text. If you have good sources backing your view I will be glad to take a look.
Peace,
SR
That is interesting. More, please on how this would relate to the early church, in light of Stephen's martyrdom after his address in the synagogue.