It isn't even a question of Christianity.
If you allow the will of the State to be imposed over the beliefs of a mainstream religion, then who is next? The precedent will have been established, and the First Amendment rendered void.
If the Obamacare mandates demanded Jews eat pork or shellfish, it would not be a "Christian" issue, either, but a definite threat to the First Amendment.
Note, "Women's Reproductive Health" is included, too--and those are common buzzwords for abortion on demand.
It still boils down to the State being in definite conflict with widely held mainstream religious beliefs, and demanding that persons purchase services which conflict with their religious beliefs or suffer a penalty, whatever Roberts called it.
That interferes with "...the free exercise thereof."
Either we all have the Right, or none of us do, because if it can be taken from some of us, it is only a matter of time before it is taken from all.
I’m going to assert that Catholics aren’t the only Christians. Read the title.
Never assume what someone is thinking. Ask.