On the matter at hand, ”defenders of marriage” cannot invalidate or add to the natural sacramentality of gays who commit themselves to eachother before God, their openness to procreation (albeit with surrogates or artificial means - sexual aestheticism aside) and their functionality sexually (qualms about its form aside). The desire to subject others to moral order says more about the cleric than the object truth at hand. Society has never been as morally tidy as some would want. Love means accepting diversity, not fearing or condemning it. Their unbidden opinion was not requested.