That doesn't really make sense to me. This would be like saying that a Jewish family creating stationary for a customer wanting ironic nazi slogans on it should be forced to do it since they aren't the ones doing the speech, but the customer. It may be the customer's words, but the family is the one producing it in their product. Refusing to provide stationary without words on it would be a violation of discrimination laws, as far as I know. But when you get words involved, then it gets more complicated. Because its going from a general product to one that has content within.