I don't think it's the skinhead hooligan phenomenon that will be present there; it's simply anti-American sentiment among the S. Korean left.
Of course, British hooligans are generally considered the worst of the entire lot. I posted a thread here a few weeks ago with the news that hundreds of them were banned from attending the World Cup and were actually forced to surrender their passports to the authorities.
Yes they are very bad. Newcastle has the worst football hooligans of all, its been estimated that there are about 1,000 regular football hooligans. They go along to Newcastle's football games and start trouble if their team looses.
Apparently, similar things have been happening in Russia. I heard that the fans from a Moscow football club have clashed with rival fans. The skinheads are bound to try to inspire the non-political football hooligans into violent acts against foreign fans or ethnic minorities. This is certainly a common problem in England.