While I agree to some extent, you do have to admit Religious values have taken a high speed track with politics, its become somewhat of an embarassment in the US government that those values are outright being valued over the separation of Church and state, which was written as a legislative piece during the foundation of the United States to combat such behavior.
Saying something like Gay's can't marry because it doesn't agree with your religious views is not something that should be considered in a Secular representative democracy. Everyone should be treated equally under law, there should be no exceptions in that area.
Heck, gays are something I don't agree with due to religious values, but I still voted for same sex marriage because its what should be done; they are citizens of this country just like I am, and have the same rights I do, even if it is not in the vein that I would prefer. Discriminating against them does not do me any service, as that can lead to discrimination against me in legislation in the future, or else I'd be a hypocrite to deny rights to others.
All of this, however, does not mean that religious morals cannot affect Government, we were founded as a secular nation, but we still uphold Abrahamic values of morality. Just because church and government is not entwined does not mean one cannot inspire the other for the foundation of law. Only when it goes to extremes that deny the rights of others should it be reigned in. Which in the current setting, is far out of hand on many facets of US politics.