LISTEN to the ROAR of that crowd. Face it... the NHL will never be that big in the USA. It will be the #4 sport and that still is pretty good.
People love the fighting. I have been to many Bruins games and never have I seen a guy stand up and say...
"KNOCK IT OFF!"
...while a fight is going on.
It won't be big in certain States, but in Philadelphia(which is where that game actually took place) it is huge.