It is difficult
It is difficult to avoid that circumcision which was already an traditional practice of the Semitic peoples, before becoming a religious mandate for the Jewish people; helping them create their unique identity as distinct from other peoples.
Given this context is difficult that could replace circumcision as a method and symbol its ethnic-religious self-identification.
The most likely option is that by some Pod early before or during their arrival in Canaan and contact with their inhabitants, was reduced to a tradition and remain as a popular, purely cultural habit not tied to the construction of its ethnic-religious identity as Jews.
Of course coexistence and possible conversions to Judaism, at least among the Gentile (goyim) of the Hellenic culture before Christianity he had been greatly facilitated ...
'' ... The Middle East in the 4th century BCE, and in the following centuries ancient Greek cultures and values beef to the Middle East.
The Greeks abhorred circumcision, making life for circumcised Jews living among the Greeks (and later the Romans) very difficult.
Antiochus Epiphanes outlawed circumcision, as did Hadrian, which helped the Bar Kokhba revolt cause. During this period in history, some Hellenized Jews attempted to look Uncircumcised by 'stretching'.
This was Considered by the Jewish leaders to be a serious problem, and During the 2nd century CE They changed the Requirements of Jewish circumcision to call for the complete removal, Emphasizing the Jewish view of circumcision as Intended to be not just the fulfillment of a Biblical also commandment but an essential and permanent mark of membership in a people .. ''