How does public support for protest rights change in response to mass mobilization events? While public commitment to democracy is crucial to counter recent trends of democratic backsliding, scholars stress that citizens’ support for democratic institutions is fragmented and fragile, particularly when it comes to protest rights. Drawing on evidence from the Latin America and Caribbean (LAC) region, we study how citizens’ attitudes toward assemble rights change in response to violent and nonviolent protest events. First, we combine geocoded protest data and public opinion surveys, and run differencein-difference models to study how protests influence public support for assemble rights across 18 LAC countries in the period 2004-2018. Second, we conduct a survey experiment in Chile to test whether these effects vary at the individual level, depending on citizens’ pre-dispositions toward the protesters’ demands. This study speaks to the broader literature on mass mobilization and public commitment to democracy. The current version is written as a registered report