or are you mean't to allow the attackers to harm your family?
He didn't attack them until they had left the house. How did his actions in any way support/defend his family? The only effect his actions had on his family was to ensure they don't see him whilst he is in prison.
I'm amazed that so many people dont get this, but then logic and intelligence are not the usual traits of the grab a bat and beat somebody school of thought.