Nationalism stands out as one of the most influential ideational forces of the modern era. Not only is it the key driver of modern nation states, but it is also strongly associated with a myriad of other important aspects of politics such as preferences for redistribution, attitudes toward violence in multi-ethnic societies, and beliefs about past instances of violence. However, most scholarly work addressing the effects of nationalism is inherently limited in its ability to credibly identify the causal effect of nationalism. We explore the effects of nationalism—triggered through large-scale sporting events—-on two sets of outcomes: (1) support for political violence and (2) support for redistribution. In both cases, we expect a strengthened sense of national identity to be the central mechanism driving our findings. We explore the effects of large international sport events and subsequent nationalism in two ways: First, we make use of a panel set-up in which we compare survey responses among comparable respondents in the UK during and after a large sport event (2024 UEFA Cup). Second, we include a survey experiment which highlights the sport event to examine its effects within survey waves. We evaluate our hypotheses by (1) comparing respondents who took the survey during the sport event as compared to those who took the same survey in its aftermath and (2) comparing respondents who were assigned to the treatment vs. control within the same wave. Finally, (3) we explore the interaction between experimental treatment and survey wave as in a 2x2 design.