Ask NWC Counseling: Who should be angry?

(Photo by Growley-Ferret) Back Story : The reader explains that someone offended them by their words and/or actions. The reader felt angry towards the offending person, however was told that they should not allow themselves to be angry and if they do become angry they are in the wrong. Question: Why isn't the offending person responsible for my feelings or emotions in response to their actions?