He was charged with 8 different crimes of violence including assaults on an ex girlfriend. And that's only the stuff they have evidence or witnesses about, I can only imagine all the other stuff that slept through the net.
You say Sherdog made you laugh hard today, but here you are justifying his actions against that "rich Dutch guy" because he made a comment about his girlfriend. I guess it's normal if somebody makes a comment about your girlfriend to break their nose, eye socket and ankle and leave them in a pool of blood. Standard.
Also, you say he's not raped or killed anyone, but somehow that guy he beat up badly and who's also the main reason he went to jail got killed a little while later. Maybe it's got nothing to do with him, but somehow I wouldn't be surprised if it does directly or indirectly.