Which part of the 1st Ammendment don't you get?
If you allow laws based on one religion, you open the country to become a religious state that allows religious based discrimination,, which we're already starting to see.
Again, there's no difference between allowing catholic business owners to deny birth control coverage to their employees and Jahova's Witness being allowed to deny employees blood transfusions.
If you can't understand that, then you're a extremist. That's just the reality. It's not about what you believe, you're allowed to believe that, the issue is when we allow legal religious presecution.