I think you misinterpreted what I was trying to say. What I meant was, most of the popular American sports involve some sort of contact (football, hockey, lacrosse, even basketball, etc), and I think that is part of the reason they are so popular. Not all sports need violence to be good or entertaining. Just because they don't have violence does not make them wimpy. But when a sport like football, which involves a ton of very rough contact, starts to have rules that strictly limits some of the contact that has been allowed for years it seems like the NFL is getting away from that toughness. Its an essential part of the sport.
I don't believe in fundamentally changing an integral part of the game (ex. blindside hits in football or fighting in hockey) because it ruins a part of it. The fans love it, as do the players, so leave it like it is.
And no I wasn't aware of how the US did in the World Cup. I haven't watched or paid attention to more then 5 minutes of a soccer game since I was like 9.