Based on some case when AFF cup 2012
Sunday's AFF Suzuki Cup Indonesia vs Laos and Malaysia vs Singapore group game, was marred by thousands of Malaysian fans chanting "Indonesia itu anjing" (Indonesian are dogs) when Indonesia was still competing against laos, and when Malaysia play against Singapore, Malaysian supporter back to chanting "Singapore itu anjing" (Singaporeans are dogs). As the game was played on Malaysia’s home ground, the tiny group of Singapore fans were understandably cowed.

The intimidation has only added to Indonesian & Singaporean team and supporter .

news link :

http://my.news.yahoo.com/angry-singaporean-netizens-lash-out-at-malaysians%E2%80%99-%E2%80%9Cdog%E2%80%9D-chant-115557515.html​

http://my.news.yahoo.com/malaysia-dog-football-chant-riles-singapore-fans-055434743--sow.html

youtube link :

www.youtube.com/watch?v=mibFjZ0Nci4
www.youtube.com/watch?v=9PngLX-1ruk
www.youtube.com/watch?v=CnNMCNXOq1c
www.youtube.com/watch?v=_S1uT1vrRJ8