Under the federal Civil Rights Act of 1964, you cannot be treated differently or unfavorably in the workplace because of your religious beliefs. Those beliefs aren’t just limited to the traditional, organized ones found in Christianity, Islam, Hinduism and Judaism, for example, but protected beliefs include other sincerely held religious, ethical, or moral beliefs. If you’re a devout Pastafarian, you’re covered.
If your company treats you differently because you’re married to, or associated with an individual of a particular religion that they don’t like, that’s religious discrimination, too, and it’s also illegal if they treat you differently because of your own connection to a specific religious organization or religious group.
The Civil Rights Act of 1964 prohibits discrimination regarding any aspect of employment, such as your hiring and firing, pay, assignments, promotions, training, fringe benefits, and any other term, condition or benefit of employment.