This paper investigates the complex dynamics of the Israel-Hamas war that began on October 7, 2023, focusing on its impact on sectarian attitudes as well as attitudes toward the conflict itself. The research employs a comprehensive methodology, including narrative analysis of Reddit discussions using term-frequency-inverse-document-frequency (TF-IDF) encoding, Word2Vec, and clustering techniques to identify distinct narrative perspectives. Additionally, we adapt a validated scale of Islamic sectarianism to measure antisemitism and Islamophobia, confirming its internal consistency in our study context. A novel scale developed for this study measures general attitudes toward the Israel-Hamas war. Through item analysis, one of the eight questions was rejected due to inconsistency, with the remaining seven showing strong internal consistency. Our findings indicate no significant change in sectarian attitudes before and after exposure to social media content, as expected. However, general attitudes towards the conflict exhibited a significant shift (T = 6.8843, p < 0.0001) favoring Israel following exposure to specific Reddit narratives. Interestingly, age emerged as a significant factor, with younger survey respondents showing a more substantial shift in general attitudes (p < 0.05). Narrative exposure and age combined explain approximately 20% of the attitudinal changes observed. Notably, only one Reddit narrative demonstrated a significant impact on shifting attitudes. This study also notes that the high proportion of Jewish respondents (40%) may influence the findings. These insights underscore the complex role of online narratives in shaping public opinion during geopolitical conflicts and highlight the importance of nuanced measures in understanding these dynamics. The research contributes significantly to the discourse on conflict-related narratives and their broader social ramifications.