Do you think the guy was right to stab the other dog? I think so as it sounds like the other dog attacked his and he was defending himself and his dog, he tried kicking and punching the other dog to get it off his first then went inside his house to get the knives.
http://www.thesun.co.uk/sol/homepage/news/4586977/Dog-knifed-23-times-dies-in-owners-arms.html