To each their own. I personally love baseball and basketball, but would rather watch paint dry than watch American football. I do, however, love real football (soccer). There are some American football positions that require real football/soccer levels of athleticism (i.e. running backs, quarterback, receivers), but many do not. In addition, it has become really hard to watch a game in which the vast majority of time you are watching nothing is happening (game time outs, television time outs, way too much time between downs, players spending most of the time standing around etc.). But that's just me.
Having said that, these Russian hooligans should be rounded up and jailed.