In a functional family, there is nothing more important than your fellow family members. There is that kinship that can’t be replaced by anything else. Of course, not every family is perfect, and it is not uncommon to not be close to a family member for various reasons. Regardless, in a close knit family, family members are willing to make sacrifices for each other.
This includes putting themselves in harm’s way whether physically or legally for the sake of the family. One should not be surprised if a family member takes matters into their own hands and teaches anyone who wrongs a family member a lesson. This can occur with friends. In some communities, resorting to physical acts is a casual thing, so taking action for a friend does not take as much motivation.