AbstractIn February 2021, the Myanmar military carried out a coup d'etat, which was then followed by a wave of civil protests. The present study aims to understand the support among people from Southeast Asia (specifically Indonesia) for the people of Myanmar who are fighting against a military coup. The data were collected from Muslim participants (N = 209) and non‐Muslim participants (N = 192) in Indonesia. The findings indicate that the perceived country's internal problems, support for human rights in Myanmar, and the perceived country's important position in Southeast Asia are among the strongest predictors of the intention to support collective movements in other countries. Considerably, lack of empathy and how the victim/disadvantaged groups are perceived, like whether they have a negative rapport in treating other groups, also play a key role in the endorsement of solidarity. It is suggested that the dynamic relationships between these factors need to be considered to find ways to foster humanitarian solidarity. Please refer to the Supplementary Material section to find this article's Community and Social Impact Statement.