The closest mention to separation of church and state is the first amendment, which states: "Congress shall make no law respecting the establishment of religion, impeding the free exercise of religion, abridging the freedom of speech, infringing on the freedom of the press, interfering with right to peaceable assemble..."
Separation of church and state is no where in the constitution. It's an idea that was originally created to combat the way England and other countries were banning and imposing certain religions, beliefs, and practices on their citizens. It's being twisted now as law, and the idea that religion cannot influence the government...and that government can regulate religious practice on governmental employees, which interferes with the first as shown above. So no, there is no separation of church and state, just that government cannot make laws concerning religion or the exercise of religion.
The Will of the Majority Should Override the Elitist Constitution Anyway
"Free exercise" does not include breaking secular laws. There was already a law against bigamy, so the Mormons could not claim an exemption based on free exercise of their religion. The Muslims can't advocate the overthrow of our government, even though the Koran tells them they can.
One of the biggest functions of the constitution is to make sure the will of the majority does not rule over the minority.
Just because we made a law against bigamy doesn't mean we didn't violate the first amendment, which we did. Government should have no place in marriage, it overstepped starting with DOMA, which was also a direct violation of the first.
And honor killing, or killing infidels, or abortion doctors, is not protected under as a free exercise of religion, since it violates right to life. Free exercise does not permit forcing others into your religion, BC that would be a violation of the 1st.
And again there is no separation of church and state, only in the sense that govt cannot make any law affecting religion, as long as that religion is not violating people's rights against their will, then it becomes a legal problem, that's already laid out in the constitution. So a school cannot ban teachers from praying, even in front of students, as long as those teachers are not forcing their students to pray. Government cannot force business owners to participate in something that violates their free practice of religion. Businesses still retain the right to refuse business, but that's being eroded. If your crazy religion states your not to do business with anyone outside of religion, it's probably a terrible business practice, but you're not infringing on other people's rights, since they have a right to choose business anywhere.