The masked killers are idiots
They were all behaving tough and badass when they were standing outside.
"We are going to kill your family once we're in"
"I'm so badass, look how scary I stare at you"
"Look how I kill my friend for no good reason"
"OMG, hell will break loose once we're in your house."
But then when they finally are in the house, they all get killed one by one by a family of 4, including two teen children who barely fight and a homeless guy.. It really got out of hand during the scene in the poolroom where Ethan Hawke kills five or six of these clowns in a row. Eventually The idiot's leader finally fights back a little by stabbing Ethan Hawke. One would think he'd make sure Hawke is dead but instead he leaves him only wounded so the character might as well have survived even though he didn't.
If anyone, it should've been the masked 'killers' who should've been afraid of the Saldon Family.