yeaaaaaah, "australian people want the extermination of aboriginals" is a very narrow definition of genocide, if that is what you think of it. i'm not sure where you live and what you do within this land, but you need not look much further than stats on aboriginal deaths in custody, imprisonment of aboriginal people in general (look #shutyouthprisons campaign for info for example) or the recent case of the murder of elijah doughty in wa and the outcome of that. so to answer your question, yes, some white australians clearly do want and do kill aboriginal people - because racism and colonialism. which is besides the point, because genocide exists as a weapon employed by the colonial state and it's structures and while whitefellas can't get away with shooting anyone they please anymore, doesn't mean there isn't ongoing attempt at destroying aboriginal people, if not always by murder, then by continuing to steal their lands and dispossess them.
i think that it is very much on you to educate yourself.
colonisation doesn't happen once and is over, it didn't happen 200 years ago and stopped. no nations that i'm aware of in socalled australia ever signed a treaty with white people, hence their sovereinty never ceded. do you know what that actually, legally (by white people's law) means? - precicely colonisation - in fact, an occupation that is illegal and ongoing.
i don't pretend i know what its like to be indigenous here or to deal with racism, that would be offensive. by taking lead we mean looking at the struggle of indigenous peoples and trying to learn from them and draw inspiration for how we can support them and for how we can engage in other struggles relevant to us, in ways that aren't too fucked up.