Didn't help that the family was....
A bunch of sissies. Anyone who has ever been in a situation where adrenaline and instinct take the wheel that getting whacked in the leg with a golf club ( bone broken or not ) is not gonna stop you from smashing someone's face in or at the very least TRYING.
The whole family was a timid and rediculously passive. I guess they would have to be for the movie to work but still I couldn't help but cringe at the abismal effort for them to protect each other.