Anyone old enough to remember when black people were not allowed to marry white people? used to be the law, used to be supported by religious folks, christians in particular. (they also were big fans of slavery, notice a pattern? creating a caste system of who gets what rights?)
You mention an important thing which is that all too often people presume to know the intent of the author of the question, without providing their own answer and not referencing what they perceive is bias in the question itself.
I would guess that anyone who has taken coursework or studied Logic/Philosophy, Critical Thinking and knows about fallacies in arguments must have several aneurysms just scanning some of these questions, and especially the Answers themselves...
The jury is out on whether i would best be described as atheist/agnostic/pagan... i am studying the basics of buddhism at the moment, but as a non-religious person - who believes most of all, as far as personal conduct, Do No Harm, first and foremost, that Gay Marriage is not harmful to anyone, it's a personal matter, and to deny any group of people a right to a lifelong, loving partnership is unjust.
As a proponent of social justice, it is really tragic that a so-called progressive nation such as the united states, would be so far behind many other countries who have legalized marriage.
I would wager that non religious/atheist/agnostic/pagan/etc. folks are much more open to equality...