People in this situation often don't know what to do with their anger. For example, I know someone that was date-raped. She doesn't remember the rape, but she did wake up feeling angry and sad and not knowing why. The only reason she knows is because of the physical evidence. Despite having no memory of the actual rape itself, she does still have the anger and sadness. Deleting a memory doesn't necessarily delete the emotions from it. In fact, people with PTSD are known for storing memory content and emotions separately. PTSD is the very case where the emotions and memory are split, so removing the memory doesn't necessarily remove the emotion.
