History of ancient Israel and Judah
All the Judaisms of the Hellenistic period, of both the diaspora and the land of Israel, were Hellenized, that is, were integral parts of the culture of the ancient world. Some varieties of Judaism were more hellenized than others, but none was an island unto itself. It is a mistake to imagine that the land of Palestine preserved a "pure" form of Judaism and that the diaspora was the home of adulterated or diluted forms of Judaism. The term "Hellenistic Judaism" makes sense, then, only as a chronological indicator for the period from Alexander the Great to the Macabees or perhaps to the Roman conquests of the first century BCE. As a descriptive term for a certain type of Judaism, however, it is meaningless because all the Judaisms of the Hellenistic period were "Hellenistic." (Cohen 1987: 37)