Well, at this point with the documented pattern of incidents, it's more like "Welcome to Bruins country". Obviously it's not all or even a majority of Bruins fans, but this isn't happening in all other cities to the extent that it's happening in Boston.
Ppl make a bigger deal of something when Boston fans or players do something then others.
It's mostly resentment due to the whole "Bruins justice" thing - there's a reason that expression has been a long-running joke among NHL fan-bases for years. Boston players have historically gotten away with a
lot of transgressions with little or no punishment. This is not a recent trend. In reality, the vast majority of Bruins players are solid, respectable guys that anyone would want on their team. There's a core of pure class and heart on that team, but then there's handful of guys on that team who are absolute shitheads. Marchand, Lucic, and Chara (Chara is one of the ongoing poster children for "Bruins Justice") are strongly disliked throughout the league because they are dirty, classless players who have gotten away with stuff that plenty of others have been penalized and suspended for.
Boston has long earned its reputation as a dirty team and if the team doesn't like that, then they'll need to change, but that will be difficult as long as they continue to employ guys like Marchand, Lucic, and Chara, and when even generally respectable guys like Shawn Thornton do stupid stuff like the Orpik thing last December. It's not fair to the awesome guys like Bergeron, Iginla, Eriksson, Rask, Krug, Kelly, Krejci, etc, but those other three guys are the definition of bad apples spoiling the bunch. If there was consistency in punishment, maybe people wouldn't feel this way.