How much did this baker spend on legal fees vs. baking the damn cake? What if he bakes a cake for a straight wedding and some gay people attend and eat some of the cake? You’re going to hell, baker man! 😉
They might as well worry somebody is going to go American Pie on their cake. Once it’s out the door you no longer have any control over the cake is used.
And yeah, if there are a bunch of other bakeries in town with no such issues, it’s easy to take your business elsewhere, but it’s the principle of the thing. Somebody else could object to baking a cake for a wedding of a different faith than their own, an interracial marriage, etc. Where do you draw the line?