Nazism, antisemitism, nationalism, chauvinism and sport should not have anything in common. Often such messages are met at international sport events. Some recent examples from Bosnia and Herzegovina and the Croatia,brings different impressions, see attachments.
I condemn such behaviour, and I do invite you to give your opinion and contribute to condemn such phenomena.
http://www.dailymail.co.uk/sport/football/article-3122188/Is-swastika-Croatia-s-pitch-UEFA-act-match-played-closed-doors-racist-chanting-appears-display-Nazi-symbol.html
http://www.timesofisrael.com/bosnia-soccer-fans-protest-ahead-of-match-against-israel/