What term describes the strict section of Jewish commemorative practices?

The term that describes the strict section of Jewish commemorative practices is Orthodox. Orthodox Judaism adheres closely to traditional Jewish law and customs, maintaining practices that have been established for centuries. This includes specific rituals and observances during mourning and commemorative periods, such as sitting shiva and reciting the Kaddish.

Orthodox communities typically view these observances as essential to the faith and emphasize the importance of following them precisely as outlined in religious texts. The commitment to these practices reflects a belief in the divine origin of the laws and a dedication to maintaining a connection with Jewish heritage and tradition.

In contrast, other movements such as Reform, Liberal, and Conservative Judaism may have different interpretations and practices around commemorative customs, which can vary widely in adherence to traditional observances.