Obviously Liverpool fans in the area with a grudge against the Philadelphia Union
It is my assumption, that the common "red bulls fan" who doesn't happen to be in a supporters club and would rather wear a euro-jersey rather than our own, is probably only going to the games because they watch soccer so much that they need an outlet to be hooligans because that's exactly what they see going on over there. In their hearts, 75% UEFA fans, 25% MLS.. maybe even less on the MLS side.. I would call them visiting Liverpool fans even they were from Jersey. And a grudge has nothing to do with it, it's just how they've seen the visiting teams fans treated in football overseas.
I'm sure
had something to do with it too.