This paper focuses on describing the increasing disharmony of ethnic relations due to social media, and the causes that arise. The rise of news on social media often triggers negative news such as hoaxes and hate speech, of course this will cause unrest. The purpose of this study is to understand the factors that cause the estrangement of inter-ethnic relations due to social media. This paper reports on four social media that are often used by students. This study uses a qualitative descriptive approach, the main data obtained through interviews and questionnaires to 2 resource persons, 25 students. The results show that Twitter is the most used medium. The cause of the fracture of inter-ethnic relations are several factors; People like to post judgments on other people's religions, Negative posts that emphasize race and religion increase tension, bad influence of cyber forces for political means and People freely post words that trigger other ethnicities and religions on social media.