Identifying with a community is also sharing in the community’s sorrow. The Talmud teaches us that only one who participates in the community’s sorrow can truly rejoice with their community. How is that truly connecting to the Tzibur, community, and not self serving?
Rav Weiss explains Rashi’s interpretation of the mishna in Pirkei Avot – Al Tifrosh min Hatzibur and its practical ramifications.