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.
It is important to use precise language. “Australians are racist.” is simply false if even one Australian is not…. So you should instead say, “Many Australians are racist.” or “Most Australians are racist.” or “On average, Australians are racist.” Those claims may or may not be true.
Also, if you make a claim like that with no source except your own experience, it’s safe to assume you’re wrong, that you are extrapolating when you should be doing research instead. Australia is a big country and you have met a small fraction of the people in it.