It's detestable to abuse a child.
John just lost his job and comes home to see his kids in front of the tv.
John wants to vent his anger.
John takes a breath and goes to his upstairs gym to work out with weights.
John raises his voice at his kids and reaches for a belt as he comes at them.
John's kids are unharmed and have no reason not to love John.
John's kids are terrified of John and feel sad and depressed.