Ch 5 § 116 The Commonwealth shall not make any law for establishing any religion, or for imposing any religious observance, or for prohibiting the free exercise of any religion, and no religious test shall be required as a qualification for any office or public trust under the Commonwealth.
Religious belief is not a factor in determining Law as that it would be discriminatory against those of other religions or those who do not believe in religion. The right to believe in a particular Religion or lack of is our right as an Australian. I believe It is not our right to impose our beliefs on others, I have the right to not have you breath fire and brimstone down my throat.
I agree with pete above. This discussion is about all persons rights being equal, which of course they are not.