Here is the bigger problem. As a customer, why would you want to support a business you know to be racist, homophobic, etc.? And do you think the cake you get from them is going to be free of “additives”? Do you really want to force someone to make your cake knowing they can give you surprises?
I usually go out of my way to not annoy food service workers. Not a smart call to piss them off over deeply held beliefs.