Society and the rules within it are based on discrimination. There are good reasons for this, whether they be moral, ethical or health based. I do not see gay marriage as a religeous issue at all. I see it as a societal issue. By allowing gay marriage you effectiveley remove the right of society to discriminate. This then means that other lifestyle choices that you may find abhorrent must be allowed. If someone wishes to engage in incest or polygamy then society would have no right to deny these people that right because they have removed discrimination from law.
It is a decreasing circle of moral ethics.
If you honestly ask yourself the question, "do I discriminate against others?, the answer would be most likely be yes. I do not know any people that would want to see incest, paedophilia and the likes legalised in their society. Therefore, in my mind, you cannot engage in selective discrimination such as allowing gay marriage. To open this pandoras box is an ill that society doesn't need now or in the future.
Are we prepared for the consequences of this action? Have we actually thought it through or are we blinded by our desire to be seen in a politically correct manner?
Gay marriage will install no further benefits onto gay couples. They already have the right to live in a gay lifestyle, they cannot be discriminated against because of their sexual orientation, partnership law protects their property and asset rights whilst a legal will allows them to gift their property on death to their partner.
Therefore, one has to ask, why do they require this change in law?"