Australians are some of the most racist people on the planet.
I've noticed, the less diverse a population is, the more racist they become while the rest of the world focuses on nations who actually have to deal with diversity. US, Sweden, etc.
As an Australian, I honestly don’t disagree with you… but suggesting Sweden has more racial diversity than Australia?! From what i can see, Sweden has “6% diversity”, whereas Australia has 9%. Not a huge difference, granted, but completely different ballpark to USA (49%), and if this is your measure, Australia still “beats” Sweden.
As an Australian who's travelled a fair bit I'd say the level of racism in Australia varies depending on where you are and most parts of the world I've visited are more racist than the major cities of Australia. But that's just my personal observation.
There is a difference between race and culture even if we tend to use the same words for both. I have a friends who is racially Chinese but was born and raised in the UK so very British culturaly.