Conservatives defending this decision only do so because it agrees with their own religious beliefs.
Certainly. And liberals decrying it do so because it disagrees with their own religious beliefs, that is, massive, all-intrusive, secular government insinuating itself into every aspect of human existence, dragging it's jackbooted stomping power to grind religion under it's heal along with it.
Open thine eyes and see that politics and religion are not just similar phenomena, but are the exact same phenomenon. They both proffer worldviews that justify gathering together large masses of people to attempt detailed dominance of everyone's lives.
As with religion, the best defense against the quasi-religion of big government is...wait for it...freedom from religion/government.