Of course it's racist to cheer against the Indigenous team! As are the following things:
* Waving the Australian flag
* Celebrating Invasion Day (or 'Australia Day', as it's called by flag cape wearing, VB drinking, Southern Cross tattooed racists who have no appreciation for the true owners of this land).
* Being proud of being Australian
* Being white and not feeling a deep sense of self-loathing for being so.
Being a supporter of the Indigenous All-Stars and berating the opposition as a "Pack of white merkins!" is, however, perfectly fine...
* Here fishy fishy fishy *