The idea of ​​peace is already being discussed in the digital space. It encourages this study to examine the idea of ​​peacebuilding in social media. This study focuses on cases of changing labels from separatist groups to terrorist groups in Indonesia. The research method uses a quantitative approach with descriptive content analysis with the data source coming from Twitter. The analysis tool used is Nvivo 12 Plus. This study shows that social media can be a new alternative to suppressing separatist propaganda through counter-separatism-terrorism narratives. Social media can also form activism that slowly changes public attitudes and responses in assessing national security situations and issues. The intensity of using social media also raises the idea of ​​post-conflict peacebuilding. However, peacebuilding cannot be based entirely on social media alone. Conventional assumptions also need to be built using a formal communication model that involves government authorities in initiating post-conflict reconciliation.