Doing business with a gay person isn't 'promoting' them or their lifestyle. Its promoting a good or service. Not a customer. The entire premise of your argument is nonsense.
Under normal circumstances I do not know how anyone would know a person practices a deviant sex lifestyle unless they were inappropriately advertising their sex life in public (exhibitionism). But they certainly would know if that person requested the shop keep to participate in their gay wedding.
The shop sells cake. Folks are buying cake. That's not 'promoting' anything other than cake. You don't promote the customer when you sell them something.
You promote the product.
The central premise of your argument, that selling a customer something promotes the customer, is blithering nonsense. Any argument based on that premise is similarly nonsense. You can't get around that.
So a homosexual asking a christian to participate IN ANY WAY in promoting a gay marriage is inseperable conceptually from that homosexual asking a christian to usurp society at its core and replace it with LGBT cult values.
Um, nope. The idea that selling a product to a customer promotes the customer is simple nonsense. And gay marriage doesn't 'usurp' society. Or cause it any harm at all. Gay marriage prevents harm to those denied the right to marry and their children. As the courts have already found. And LGBT isn't a cult. Its just a group of people.
You managed to pack 3 fallacies into one sentence. That's some potent babble density right there.
Since any church resides in its most important essence within the heart of each man, no homosexual may require them in any walk of their life to participate in their "gay marriage".
You're not a church, Silo. You're not a mosque. You're not a synagogue. You're a person. After creatively reimagining the word 'promote', now you're making up a brand new version of the word 'church'. Your problem is that words already have meanings. And you pulling an imaginary made up one out of your ass is meaningless jibber jabber. As it has no relevance to anyone but you.
And you aren't the basis of any legal ruling.
Again, we aren't talking about a homosexual being denied turnips for sale by a produce store. We are talking about a homosexual being denied a leg-up to usurp the core of christian values at their heart (marriage).
Save of course, that homosexuals aren't usurping society by getting married. They're
contributing to it. There's no harm being done to you. There's nothing being taken away from you when a gay person gets married. You've imagined harm that doesn't exist, and then insist that we have to deprive people of fundamental rights based on your imagination.
Um, no. We don't.
No homosexual has the right to ask a christian to abdicate his religion in favor of promoting the LGBT religion to strike at the heart of christian culture (marriage) with a depraved torpedo..
There's no biblical prohibition against selling someone cake. So the commandment being violated by selling cake
is non-existent.
If you want to do business with the public, you're subject to the basic standards of conduct with your customers based on the laws of your state. You have to treat your customers fairly and equally. 'We don't serve your kind here' may have been superb fair at southern lunch counters in the 50s. But its invalid clap trap by the laws of today.