Actually, there is a great deal of difference between the two. The stewardess works for the airline, and she is refusing to follow the policies and procedures of her employer, which existed and were clear to her before taking the job. Her employer has the right to fire her if no reasonable accommodation can be made.
The clerk works for the people of her county. She was elected to office by them, which is why she cannot be fired. The people of Kentucky voted overwhelmingly to keep marriage between a man and a woman only. So in her actions, she is fulfilling the policies and procedures approved by her "employers" at the time she was "hired". Those policies and procedures have not been changed by her employers (the voters); instead, the changes have been imposed by federal courts.
So you may disagree with the clerk's decision, but to compare her to the Muslim stewardess is an example of very faulty reasoning.
Logical and informative argument. Thanks.