What have the Australians got against us English?

Ok, so I'm 13, and my family have emigrated to Australia because we have family over here. I understand that a little racism is to be expected but now even my teachers are making horrible little comments, it's really humiliating and some of the comments are really offensive. I dont understand, the Australians are just English convicts!! I dont know why the Australians are so racist against the English, for example, I'm top in all my cles because the work we did in England about 3 years ago i'm now doing in my cles here! I really don't understand this racism thing, it's so pathetic.