Members of societies in conflict hold stable positive and negative views, and emotions of the in‐group and out‐group, respectively. Music is a potent tool to express and evoke emotions. It is a social product created within a social and political context, reflecting, and commenting it. Protest songs aim to change views and attitudes toward ongoing conflicts. Their message may be expressed positively (pro‐peace songs) or negatively (anti‐war songs). Previous research has shown that evoking emotions such as guilt toward the in‐group or empathy toward the out‐group may influence attitudes toward reconciliation. The present research, conducted in Israel, presents three studies investigating whether emotions evoked by positive or negative protest songs may influence in‐group members' guilt toward the in‐group (Israeli Jews) and empathy toward the out‐group (Palestinians). Studies 1 and 2 show that negative emotions evoked by negative protests songs predicted both empathy and guilt when the out‐group is considered as a whole (Study 1) or as a particular individual (Study 2). Study 2 in addition showed that empathy predicts an altruistic decision regarding an out‐group member. Emotions evoked by lyrics alone (Study 3) did not contribute to explained variance in either guilt or empathy, nor the altruistic decision. Results suggest that negative emotions expressed by negative protest songs, focused on the in‐group, are more effective in influencing attitudes toward out‐groups. Results are discussed in the context of group emotions in conflict and the role of protest songs in intergroup relations.