If the wedding designer has a "blank wedding site" package premade and refused to sell it to them then I don't think that's right. But if all of the websites are bespoke designs where the designer must create something for the couple, it's fuzzy.

Personally, I don't know. There is, and should be, a line between personal life and work life. But depending on what you do for a living, the line can be a thin one or a thick one.

For example, if I churn out hundreds of identical 3D printed characters and sell them at an open-air market, I shouldn't be allowed to single out a customer and refuse business just because I don't like the look of them. But if I'm a graphic artist, I shouldn't be compelled to draw something that I find objectionable. Eg: I might be a woman who has been sexually abused in the past, and someone wants a sexually graphic depictions of a sexual assault (like the Guns 'N' Roses "Appetite for Destruction" cover).

Those examples are easy to comprehend because they're extremes. The difficulty in interpreting the outcome of the case is trying to bring the examples closer to the center.

Can you refuse to sell handpainted greetings to someone you don't like? No. It doesn't matter that it's a creative endeavour. If you created the product without coercion, and are now selling them at a stall in your local town, it's not ok to refuse a simple transaction because you don't like the buyer. What if you also offer a service of writing a message in fancy calligraphy on the inside? Can you refuse to write something you find objectionable? I think so.

I don't think it comes down to who your customer is. I think it comes down to what you're being asked to do.

Edit: lol, what a typo. Thanks swype keyboard!