Arguing is sort of like sex. It should be a privilege to do it with you, because it's not something you are willing to do with just anyone. Many people want to do it with you, but you actively refuse it to all but the most worthy.
When someone you really love hurts you, it's your job to protect them from the worst words in your heart. You must keep them safe even when they have failed you, and not mirror their failure with a failure of your own.