Nope someone who used the issue as an attack on the church under guise of an equality argument and then was apathetic or even antipathetic toward heterosexual partnerships and let me be more specific....others justified that on an ''insufficient numbers or insufficient suffering to be bothered about it'' basis. No Theists fit the bill.
You are like the most bizarre of conspiracy theorists.
I know countless people who support the change to the law on marriage (including I should add many active church-goers), I can't think of anyone who fits your bill - in other words someone who was disinterested or actually opposed but who claimed to be for equal marriage just to get at religion. None, not a single person.
I can think of some people who became more resolved to campaign for the change when face with the almost hysterical and demonising negative campaigning by some within religious organisations - but that isn't the same thing at all. Many of us were appalled by the way the churches campaigned and many churchgoers were deeply embarrassed and felt shamed by their approach. And sure that may have strengthened resolve to ensure that the argument was won and that a rare change to increase fairness and equality in the UK was grasped. I think we would have felt terrible if the negative campaigning of a small minority had been sufficient to cause parliament to lose its resolve to do the right thing - and we were going to do all we could to make sure that didn't happen.