People have gone to prison for doing what the state required of them. There is a higher truth than state law. Employees are ultimately required to stand with higher truth, not with the law.
If no one had been willing to turn on the gas at Auschwitz no one would have been killed.
They can stand out of the way, while looking for a new job.
Seriously, would you feel the same if the clerk refused to hand out gun permits cause she felt a moral compulsion to resist "gun violence?"