
I don't think it was a one off either, the person who filmed him had witnessed previous attacks on the dog, had become frustrated at the authorities lack of action and so posted the beatings on FB. What was filmed was a sustained attack, hardly the actions of someone who claims to be an animal lover, everyone gets exasperated and stressed, only those with anger management issues resort to punching a dog in the head.
I hope Social Services are keeping an eye on his child.