The confrontational point is apt, a lot of people are opposed to change for the sake of it, although I'm not sure it's necessarily because of a latent distaste for homosexuals as opposed to more rigid adherence to "tradition".
Fair point, I was being reductive. I suppose in my own limited experience with people in the 'vote no' crowd, the sentiment more frequently reflects culturally-based core beliefs of "but that's just not how it works" and perceptions of homosexuals as 'other', as opposed to disgust.
Still, I'm suspicious of the more militant attempts to tie marriage with terms such as "organic bodily union", "heterosexual union", procreation etc. It reeks of a covert fallacious appeal to nature.
So basically what you're saying, is "let's rename civil marriage to civil unions, and leave marriage to religions." Which is fine, but why? I can't think of any state interest to do so.
Neither can I. However there is impassioned argument from those opposing marriage equality, claiming there are numerous tangible benefits to the state and society in doing what is, in my mind, analogous to the anti-miscegenation laws in the US prior to 1967 that outlawed interracial marriage and intimacy.
Russ made a point earlier about "discrimination". I agree somewhat - the 'discrimination' part is irrelevant. As a society we readily and happily discriminate (in the strict definition of the word) against a number of groups and individuals. Most of the discrimination is completely uncontentious and is in fact viewed as positive.
It is, for instance, discrimination to have separate bathroom facilities for males and females. It's discrimination to fine people who do not give up a disabled access seat on public transport to a person with certain special needs.
The crucial element is the justification. Is it sound, is it rational, is it consistent with rights, liberties and values as well as evidence and to what degree.