MMA is a keenly American phenomenon.
veen's basic point is that American sports tend to more violence - in the rules - than sports in the rest of the world. Hockey players, worldwide (green = lots):
MMA advertising by country:
Meanwhile, you've triangulated to "rugby is not totally clean" which, c'mon. It's considered the most violent sport in the world by most people. You're a long way from "lol bullshit" son.