They get that way in Philadelphia with football(NFL). I moved there from Texas when I was 15 and showed up to first day at school with a Dallas Cowboys jersey and ended up in 3 fights that day(none of which I instigated). The guy who started the last one said he was sure I was a nice person but had to rough me up as a matter of principal. He was the worst of the bunch too. He broke my nose. He did help me up afterwards and I ended up good buddies with him a year later. He's one of the guys who throws batteries at the other team at Eagles games.