This may work in his particular case, if he means that anyone who is violating biblical principles will not be served. But instead, he's talking about *events*. There are two potential applications: 1. He does not design cakes celebrating a particular event that is wrong. This may not preclude the marriage of two atheists (there's nothing in Scripture that states the *marriage* of two unbelievers proper is illegitimate). 2. He does not design cakes celebrating particular events that are considered "worse" than others. I prefer (1). After all, if you came to me asking me to design a cake (were I able to do such a thing) celebrating your lying to your best friend about something, I would (if I took it seriously) also refuse. It's the *event,* not the people. I'm not sure why people don't make this distinction.