As a Labor Activist, Union Member and construction worker, Marriage Equality isn't something I usually write about, but I do support everyone's right to marry whomever they love, no matter their gender. Often enough people look at me and assume I must feel this way because I have a close relative who is a member of the LGBT community, which isn't the case. As a Unionist my core belief system is centered around equality, so it would make sense that I wouldn't want to deny certain citizens the same rights that the rest of us take for granted.
And equality is what it all comes down to, not religious beliefs. The fact is that we often mix the religious marriage and marriage under our secular government. Think of it as a civil contract, we have the choice to go through the religious ritual or not. Whether you choose to go through the ritual or to just stick with the justice of the peace, you are still under secular marriage law, which is contractual law.
So no one is saying that religious institutions have to grant ritual marriage to anyone, in fact that would be unconstitutional. And even to this day there are Roman Catholic Parishes (not all) that still deny marriage to couples where one of them is not of the Roman Catholic faith.
But to say that two individuals who are of legal age and consenting, but happen to be of the same gender can't enter into a binding civil contract under our secular laws is ludicrous. That is just as unconstitutional as government dictating to religious institutions who they can and can't marry.
Rights are Rights. Period.