No because Freedom of Religion does not mean you get to kill someone for heresy. It does not mean you get to break the law. And if you feel morally unable to issue a marriage license to a gay couple you should get a new job. Freedom of religion mean you can worship whatever you want but your beliefs are your own personal thing. If it affects someone else then no they can't force you to do it but you will be fired and you will be penalized. Plus the government does not recognize religions. My religion could involve not allowing people to drive others places but if my job is a bus driver I'm not going to be employed very long.