Self-justification describes how, when a person encounters cognitive dissonance, or a situation in which a person's behavior is inconsistent with their beliefs, that person tends to justify the behavior and deny any negative feedback associated with the behavior.
Read more about Self-justification: Cognitive Dissonance: The Engine That Drives Self-justification, Self-justification Strategies, Insufficient Justification, Self-justification and Moral Choices, Decision Making: Conflict Escalation