American religious-liberty watchers are likely familiar with the case of Barronelle Stutzman. A grandmother from Washington State, Stutzman has worked as a florist for most of her professional life. For more than nine years, she willingly served Robert Ingersoll and his same-sex partner. She created numerous floral arrangements to help them celebrate anniversaries, birthdays, and other special events.

In 2012, an employee told Stutzman that Ingersoll was going to ask her to provide flowers for his ...