If I want to treat you as less of a human being because my religion says you don't have the same rights as everyone else, I should be allowed to do so without legal repercussions. And if you make me treat everyone the same, that is coercing me to disregard deeply-held religious tenets which could harm me irreparably.
My deeply-held religious beliefs tell me that I must refer to all men as "Useless Asses." I must address all men as Useless or Ass or Useless Ass. If I do not do this, I risk angering my Goddess-mother She-Ra. I cannot ever be fired for referring to any of my male employees as a Useless Ass because I could bring a religious discrimination suit.
In fact all the men who work for me are required, by my religion to always have an erection. I should be able to control the bodies of my employees, the Useless Asses, because my religion says so. And if you don't like it, you can go work for Hobby Lobby where they only control their female employees' bodies.
In a secular nation (we are still a secular nation, right?) when did it become standard to argue that discriminating against others (women and gays, really) is okay because Jesus would have wanted it that way?