That worldly government regulates marriage is true. We the church, should not help, to agree with them.
Well, different churches probably have different takes on that. In general, my church has not had a problem with recognising the validity of what the government decides, even if it doesn't always reflect a Christian ideal (so, for example, a more historical example would be recognising the reality of a secular divorce, rather than insisting on a church annulment process as well).
But again, holding your view wouldn't mean you're not welcome in our church. There is a plurality of views on all sorts of issues, and we don't generally demand conformity.
Yes, unless our religious institutions help them to agree with them against us.
Ah, so your issue is that if religious institutions are not vocally denouncing same-sex marriage as "not real marriage," you feel they are undermining your own position? I can understand that frustration, but my sense is that Anglicanism historically has sought to be broader, making room for as many people and views as possible under an Anglican umbrella, rather than taking a narrow position.
The reality, on the ground where I am, is that on any given Sunday I might have people in church who believe that a same-sex marriage is not really a marriage, and a person or people in a same-sex marriage, in the congregation. I would be concerned to make it possible for everyone there to worship and seek God, without making views about secular marriage law the point which drives anyone away.
My comments concerned Church governance as an authority from God. Therefore if any does not accept their teaching on this, they can leave. Yet, they in doing so are rejecting the authority of their own Church governance that was before them. Those governing authorities never taught such things about homosexuality. Those forced to leave, are the ones keeping with the governance of the forefathers of their faith and teaching. Either it was a GOVERNANCE FROM GOD PASSED ONTO THEM, OR IT WAS NOT. If they do not recognize it themselves, why should anyone else.
I suppose different churches take a different approach to this, but there is very little my church would consider binding, in a "believe this or leave" kind of way. My point was aimed more at, say, clergy, who agree to operate within the church's structures and governance. We are not free to say, "Well, I don't agree with that so I'm going to throw it all out and do my own thing."
And never before has the church had to answer the question, "is a same-sex civil marriage really a marriage?" so I don't see that answering that it is, at least, a legal reality, is rejecting the authority of those who were before. The question of the relationship between civil laws and Christian ethics has a long and complex history and there are multiple strands of thinking to draw on. (As I said, accepting or rejecting the reality of secular divorce provides us with a relatively recent case study).
@Robban, that's an interesting observation. I was reading something recently about C. S. Lewis suggesting (in the 1950s) that the industrial revolution heralded the post-Christian age, as machines fundamentally changed our relationship to power and agency, and therefore our thinking about God. I have more reading and thinking about that, to do!