After the death of Alexander the Great, his three generals divvied up his Empire. The Greek city-states went to Antigonus. The northern region from Persia through Babylonia and Assyria was taken by Seleucis. The southern region, including Egypt and Palestine, was taken by Ptolemy.
Even so, the Greeks expected their vassals to adopt their language, manners, customs, and ideals. Among other alien ideas, the Jews had to cope with the popular philosophy of Epicureanism that encouraged a life of cynicism, in which Divinity played no role in human life, and our only purpose was to free ourselves from concerns about morality so that we could pursue a life of physical pleasure. As has always been the case, this was a very fashionable and attractive philosophy for many people, especially among the young. Between the prosperity and the pleasure, many Jews were happy to be Hellenized.
Also during these years, there was constant fighting between the Ptolemies and the Seleucids, both of whom wanted control of the eastern Mediterranean seaboard which included Palestine. Finally, in 200 BCE the Seleucids, under Antiochus III, wrested Palestine from the Ptolemies. Still, Antiochus continued to allow the Jews freedom of worship and the right to govern themselves, so it didn’t make much difference and once again many people were perfectly content to be tax-paying vassals of the latest Hellenic emperor.
But he still thought he might be able to defeat these upstarts if he had the help of a truly united empire behind him. So Antiochus embarked on an intense project of Hellenization throughout his realm, including placing statues of himself, as a god, everywhere. In Palestine, of course, the Jews objected vehemently to this idol-worshipping project, and Antiochus decided to let them be — so long as they demonstrated their continued loyalty by providing taxes and soldiers. But then Antiochus III died, and the son who soon took over, ‘Antiochus Epiphanes’, was not so agreeable.
In time, the aristocratic pro-Hellenist forces in Palestine, believing it to be in their best interest to support Antiochus Epiphanes in his Hellenization program, convinced him (and very likely bribed him) to appoint one of their members, a priest named Jason, as the new High Priest. The High Priesthood, which controlled the great wealth of the Temple, had fallen into a corrupt institution. Within a year there were Greek statues and Greek rites in the Temple. In response to this, more and more moderate Jews flocked to the anti-Hellenist Hasidean party, and the divisiveness in Palestine approached a state of civil war.
Antiochus, however, was very much alive. And when news of the uprising reached him, right on the heels of his humiliation by Rome, he was enraged. He marched into Jerusalem, slaughtered thousands of people indiscriminately, installed new statues in the Temple, looted the Temple’s wealth, and invited pagans to come to Jerusalem and settle there. Still angry, he then outlawed the Sabbath, forced Jews to sacrifice pigs to pagan gods in their own Temple, and forbade circumcision.
It was a reign of terror.