It’s close to that but not quite - a dick cake is a dick cake, but a wedding cake with a man and woman couple vs. a wedding cake with a man and man couple is treated differently
So, this is treating representing gay marriage as if it is unethical and vulgar which is clearly discriminatory
The law still doesn’t permit the shop owner to blanket refuse service to someone who is gay (or MAGA), but fully allows them to descriminate against gay people exercising the same freedoms non-gays have, like getting married