I had a week in Frankfurt with the missus for the first two England games and beleive me, there are plenty of arseholes knocking about. When we first got there we were chatting to a couple of guys from our flight outside one of the main bars, all of a sudden one of them says "Hang on a minute." then wanders over to a Serbian fan who was holding a flag and drops him. He came back muttering that he shouldn't have been in "our" bar. Hence to say we left pretty sharpish. We found a nice little aussie bar full of Yanks and Aussies and used that place for the week, met loads of good lads.
I was surprised how many Aussies are either Reds or bitters.