Why did the Hasideans initially refuse to fight on the Sabbath?

The Hasideans were a pious Jewish sect deeply committed to the uncompromising observance of Judaic Law. Their initial refusal to fight on the Sabbath stemmed from their profound devotion to the commandment against performing work on the holy day, which they prioritized even over their own survival.12

Because they viewed the Sabbath as a sacred time where any form of labor—including military engagement—was strictly forbidden, they chose to face martyrdom rather than violate the Law. This steadfast adherence to their religious principles resulted in the loss of a thousand lives during the early stages of the Maccabean revolt. Following this tragedy, the leader Mattathias determined that the survival of the resistance required a change in policy, ultimately insisting that all groups must fight on the Sabbath if necessary to defend themselves.12