Quote from : The White Knight Syndrome: Rescuing Yourself from Your Need to Rescue Others Book

Volatile expressions of anger and hostility combined with a tendency to blame others often result from feeling shame.... If you are shame-prone, any accusation directed at you, regardless of how mildly it may be delivered, has the potential to make you feel that you have failed or that you are inadequate. Rather than simply admit wrongdoing, you get angry and accusatory in order to hold yourself blameless. Using anger or hostility for self-protection hides your vulnerability and needs. Unfortunately, since most people are repelled by an angry response, this method may be effective. Your anger may drive away the very people who should know your real feelings, and it may deprive you of the opportunity to allow others to be aware of your needs. Behaving in an offensive or frightening way toward others can cause them to retreat out of fear. But, actually, the fear is your own, which you have turned against someone else in the form of anger.