It is my hope that the Australian herd becomes supreme across all the land. Our ethnicity being as various as it is, at this time the only defining quality of an Australian is his citizenship. However, this will change with the rise of the Australian herd because its members will all share a well-known truth that’s opposed to the lie. This is my solution to the subterranian aspect of multiculturalism.
Not with that attitude! I’m not very familiar with Australian politics and ethnic relations, but I know that great steps and growths were made in the US as far as ethnic relations go. Granted they’re not perfect, but they’re a hell of a lot better than they were 100 years ago.
So… eradication of all other cultures? Is the “Australian herd” a reference to those people who are on the higher end of the civilization spectrum? Or… what? Initially your “across all the land” comment sounds slightly racist and/or elitist. Could you explain a little clearer what you mean?
What truth exactly? Is there a lie that is being spread about something? Or is it a lack of education? Or what?
The Australian herd shall include every Australian citizen. There will be no common ethnicity, only a shared truth. This is the only way a multiculture can leave ethnic and political hatred behind it without erasing God.
‘…for hitherto that which has been called the truth has been nothing but the lie’ - Nietzsche, Ecce Homo
The ‘truth’ shared by the Catholic people is otherwise known as the lie (although they themselves call it ‘the truth’). It’s the most mendacious and harmful truth of all. It’s rather shocking that it has yet to be completely erased. Zeus should be told off. 
So… wait… huh?
Thats a little vague. The “lie” is what the Catholics are spreading?
Are the Aborigines not considered Australian citizens?
Is the discrepancy between theists and non-theists? Whites and blacks? Civilized and uncivilized?
Yes. And not only the Catholics.
Yes, they are.
The friction is between different peoples and herds. If we all shared the same truth it would vanish. Sure, the proportion of the population who experiences it is not huge, but our per capita drug use is one of the highest in the world and as a result this segment of the population is increasing in size quite rapidly. What I’m proposing is a cure for them.
Note: I have revised the OP.