"Congress shall make NO LAW respecting religion...".
For Bible Thumpers, prophecy speaks of a "falling away"...pretty obvious. When times are easy "the children sit down to eat and then rise up to play". When the consequences of pain and death begin to stalk a society that turns away from the 'Spirit'...then that society will ultimately seek the only visionary hope and solace that is possible.
*Sin* is simply any thought or action that moves the individual away from the ideal of Universal Love (God). The very act of homosexuality is based on SEXUAL preference; so is adultery. Both - in principle, are condemned as sinful, or not moving one toward the ideal; as both discourage the basic building block of societal love and unity. The Family.
The Church can 'love the sinner' (homosexual or adulterer) but it can NEVER do so in PRINCIPLE. If it does, in order to follow cultural 'norms'...then that church would be corrupt at it's core.
Sex is not about love. It's about SEX. Both homosexuality and adultery work CONTRARY to promoting a healthy, family unit-based culture. And when the consequential chickens of that choice come home to roost (they are)...then when the dust settles it'll all be pretty clear.
Don't matter what the Government or the Church does, in the big picture. Truth rules, and guides particular INDIVIDUALS toward the 'promised land'...irrespective of Churches and Governments towing the culture du jour.