<p>Digital platforms have expanded the spaces in which religious authority among Indonesian Muslims is produced, negotiated, and contested. However, limited attention has been paid to how ideological differentiation within Muslim publics shapes the circulation of misleading claims. This study examines how Islamic ideological orientations influence the credibility and dissemination of misinformation in the #Reuni212 discourse on X. Using a mixed-methods account-level content analysis, the study analyses 1,363 Indonesian accounts drawn from posts collected through Drone Emprit Academic between 2 November and 4 December 2019. The findings reveal a stratified ideological landscape dominated by fundamentalist, transformative, and modernist accounts, although misinformation is not confined to any single orientation. Misleading content rarely appears as outright fabrication; instead, it more commonly takes the form of unsupported allegations and sweeping generalisations. Anger emerges as the dominant affective register, while fear and disgust are more closely associated with threat-centred narratives. Communication is shaped primarily by platform-native social formats, and discursive attention focuses more on political institutions and religious authorities than on individual actors. Overall, the findings suggest that ideological plurality constitutes an epistemic environment in which contested claims gain plausibility, moral force, and visibility within Indonesia’s digital Islamic public sphere.</p>