Conventional wisdom holds that violent protests alienate the public. But violence could also create tactical disagreement among protesters and weaken their unity. So, to what extent does protesters’ use of violence erode intra-movement cohesion? This article argues that protesters can preserve cohesion by falsifying their private moral preferences and restraining themselves from public denunciation, an act which I characterize as ‘tolerant solidarity’. Based on a survey experiment on participants of Hong Kong’s 2019 protests, I examine how their private and public preferences toward violence change in response to three divisive conditions: protesters taking the initiative, violence causing physical harm, and violence targeting counter-protesters. Results show while these divisive conditions make respondents more likely to morally disapprove violence, the effects are weaker in their support for public denunciation, an indication that their private preferences are partially concealed. Findings contribute to the study of contentious politics by advancing a more complex understanding of movement cohesion when protester violence is involved.