When a narcissist calls someone "crazy" after the victim reacts to their abuse, it is typically a tactic known as gaslighting. Gaslighting is a form of psychological manipulation used by narcissists and other abusive individuals to make the victim doubt their own reality, perceptions, and emotions. The goal of gaslighting is to exert control over the victim by making them question their sanity and judgment.
In the context you described, the narcissist might call the victim "crazy" to discredit their valid emotional response to the abuse. By doing so, the narcissist attempts to shift the blame onto the victim, making them believe that the blowup or reaction was entirely unwarranted or exaggerated. This manipulation tactic can make the victim question their emotional stability and may lead them to doubt their own perceptions of the abuse.
Gaslighting is a powerful tool used by abusers to maintain control over their victims and to deflect responsibility for their harmful behavior. It is essential for victims of gaslighting to recognize what is happening and seek support from trusted friends, family, or professionals who can help validate their experiences and provide a more objective perspective.
If you suspect that you are dealing with a narcissist or are experiencing gaslighting in a relationship, consider reaching out to a therapist or counselor who specializes in abusive relationships. They can help you understand and cope with the dynamics at play and provide strategies for protecting yourself from emotional harm.