As I know, croatians and australians don't hate each other, unless it's about soccer.
some time ago, long time, when it was really really hard to live in croatia, our ppl started to leave the country. Most of them ended at USA, australia, Germany and south america. So all players like viduka, skoko, simunic, seric, didulica are austrlian born guys, but parents wore croatians. so ofcourse they had 2 passports. they becomed a good players, and needed to decide for what NT will they play. Like we all know viduka and skoko stayed at australia, other 3 took croatian passport.
There is a big croatian colonia in australia, they even have own league there, offten there are big fights, and all that stuff.
But in some way australia never forgive simunic and co. for chosing croatia
on the other hand, croatia did to viduka and skoko