What cognitive bias is exemplified by the belief that one's group's actions are always justified while others are not?

The belief that one's group's actions are always justified while those of other groups are not is a clear demonstration of in-group bias. This cognitive bias leads individuals to favor their own group over others, often resulting in the perception that their group is superior or moral in its actions, while external groups are judged harshly or unfairly.

In-group bias can manifest in various contexts, such as social, political, or sports environments, and influences how group members interpret behaviors, viewpoints, and decisions. Those exhibiting in-group bias may rationalize or overlook negative behaviors and actions within their own group, while being quick to criticize or condemn the same behaviors in out-groups. This biased thinking can reinforce group cohesion but also contributes to division and conflict between different groups.