Hope some of the guys claiming he was treated unfairly and comparing his incident to the Slater one admit they were wrong. This incident is absolutely disgusting, and the guy deadset never deserves to be allowed to play our game again IMO. One is a case of a bloke defending himself, the same as most males would do in those circumstances. The other IMO could be considered attempted murder. Atleast I think death is a very possible outcome when a 112kg football player stomps your head into the ground after beating you up.
edit
And I don't consider him to be a Newcastle Knights player. He had never taken the field for them, his contract wasn't registered and clearly the NRL refusing to do so was more then justified. They were just unlucky to have signed a player who was a piece of shit human being.