[talmand]

Vigilante justice is usually about the people choosing to enforce laws that they feel the government is choosing to not enforce. Vengeance usually has nothing to do with the law or its enforcement.

Say a heinous murder is committed and the perpetrator has been discovered. Vigilante justice is a person, or group, taking the perpetrator into custody and punishing them because they don't like that the government refuses to do so for some reason. Vengeance is a person, or group, taking the perpetrator into custody and punishing them even if the government wishes to do the same.