This study examines how mechanisms of boundary enforcement within Jewish communities shape the belonging of Jews who grapple with Zionism. Drawing on Joel Migdal’s framework of communities of belonging, boundaries, checkpoints, and mental maps, this study conceptualizes Zionism as a normative boundary that structures acceptable expressions of dissent. Using qualitative interviews, the study explores how individuals who experience tension with Zionism encounter social and institutional responses that enforce intragroup boundaries of dissent and belonging. The analysis traces how variation in boundary-enforcement impacts identity and expression, producing outcomes including conformity, silence, or alternative articulations of Jewish belonging. By investigating experiences across a spectrum of positions on Zionism rather than only overt dissent against Zionism, the study demonstrates how broadly ideological dominance regulates belonging. The findings contribute to scholarship on Jewish diaspora politics and broader theories of intragroup regulation by exploring how belonging is actively maintained through practices of enforcement and identity negotiation.