***But the Gospels were written in Greek, most probably by Greeks, and definitely for Greeks.
I think it is a fair assumption to say that the Greek Church understood her own scripture, in her own language, like no one else. ***
That is something that the Judaizers (and indeed the children of the Reformation) have seemingly never understood. And any attempt to include the Septuagint (the OT of Jesus and the Apostles) which was written in Greek falls upon either deaf ears or hostile ones.
The Greeks were the receptors of the NT, just as the Jews were the receptors of the OT. Does that not seem as if God switched horses in mid stream?
People like Paul are called Hellenic Jews.
Well, we must remember that many Jews in the early Church were Greek-speakers, like St. Stephen. Palestine was a multilingual region. And Paul’s first missions were to the Greek Disapora. Greek was the lingua franca of the eastern med and Paul had a great advantage in knowing Greek as well as Aramaic and Hebrew. Culturally as well as legally he was a citizen of the Empire. Furthermore, as Paul Johnson surmises, many Jews assimilated into Graeco-Roman culture by joining the Church, especially after the Jewish community narrowed its cultural horizons after the devastating Jewish Wars.