Art is an expression of one’s beliefs, and artists are always free to turn down a commission (if they can afford it). Were they not, were they to have to create art in someone else’s service with which they disagreed, it would be a violation of their free expression and conscience. Forcing artists to produce art to another’s tastes by force of the state is something that happens in totalitarian dictatorships. It’s not supposed to happen in America.
Want to see a real slippery slope? Let’s try a couple thought experiments, to see where this could go, under the logic of the LGBT absolutists.
Imagine a neo-Nazi buying swatches of red and black material, taking it to a Jewish tailor, and demanding the production of a uniform. Better yet, and more to the point, imagine the Westboro Baptist Church demanding that a gay interior decorator take a commission to spruce up the facility. And if they didn’t do it, they would be sued.
Gay-marriage advocates may think that their new-found right is a thing of beauty, to be celebrated, but that doesn’t give them the right to force others to agree and to celebrate with them. Rather than demanding that others bend to their will, they should be asking themselves why would they would even want people who find their ceremony repugnant to be involved with it.