Why exactly do you think those two positions are necessarily in opposition? You can be proudly gay while still believing that 'marriage' is only between men and women. AFAIK this is a pretty common belief among those who are both Christian and gay.
For what it's worth, I don't think the government should be involved in marriage in any way, shape, or form. States should issue civil union licenses, IRS 1040 forms should refer to one's civil partner, and medical decisions should be deferred to one's civil partner. In that model, a marriage would be a purely symbolic act between you, your partner, and whatever higher power you believe in. Not the state.
Also, out of curiosity, which of the many biblical models of marriage do you subscribe to?
Hell, even the Ancient Greeks didn't practice gay marriage (as far as I know!)
Is there any reason to believe this is a common alignment of views? While I haven't seen things broken out at that detail level (e.g., gay marriage views of gay Christians), in general, belief that society should accept homosexuality tracks pretty well with belief that gay marriage should be allowed; I'd be very surprised if, even among, say, Evangelicals (the Christian religious subgroup polling shows most opposed to gay marriage), the share of that population that is gay isn't mostly part of the 27% (from Pew earlier this year [0]) of that group that says that gay marriage should be accepted.
[0] http://www.pewresearch.org/fact-tank/2016/05/12/support-stea...
Why does it have to be common? I wouldn't consider it to be a valid position, but I would find it plausible that some people would think so.
The post I was responding to claimed a belief that it was a common view among gay Christians; I was asking whether there were facts on which that belief was grounded.
That is completely distinct from the concept of a legal union as defined by the state, which should be available to all consenting adults. Hell, as a mathematical type myself, if you can get it working in 2 dimensions you should be able to generalize to n dimensions, so why not legalize a union between any n consenting sentient beings while we're at it?
The bigger mystery is why any non-christian gay people would care...?? If you're not Christian, you shouldn't care about a religious 'marriage', only civil unions. If you are Christian, you should take it up with your Church and work on change from within. I mean how is it going to work? If you're a Christian gay and you feel hurt and not included because your faith denies you the right to a religious marriage, are you really going to feel any more included when the state kicks the door down and forces them to accept you? They have to decide to accept you on their own.
I just don't get the whole issue.
"Civil union" as an institution name was created in the US for the separate-but-notionally-equal state law institution adopted in some areas while denying civil marriage to same-sex partners.
"Sure the GOP will accept us -- as long as we keep a low profile, don't call them on their open bigotry, and don't ask for too much in the way of actual rights" being just another recent manifestation.
Citation?