Unclear and deceptive OP, but I'll bite anyway.
Two answers: 1) You shouldn't do anything unethical or illegal. If your employer asks you to do so, make non-committal affirmative noises, cya, and start looking for a new job while talking to a lawyer about what you ought to do. 2) Taking a job that requires legally providing X service or doing Y task, and then claiming "but I don't believe in X or Y" is the act of an ass and a fool.