Turn what against them? Lobbying through a government that has embraced the devil will get one nowhere and it will increase one’s guilt. Give an inch and they take a mile.
Is it obvious that the courts will continue to subvert the Constitution? Then it is time to dig in and not waver; remember that the one who wavers will receive nothing from God, as noted in James 1:5-8. The devil has the power to lay nations low, and has done so in the past.
As for the rest, making The Almighty's Word on the matter part of the wedding caterer's uniforms and putting in the fine print that those uniforms were a part of the required dress for the service providers would make the terms and conditions of the service something the homosexuals could accept or decline, but a standard part of the service rendered.
I see little likely objection to that by Christians, but the homosexuals might not like it.
As long as it is standard business practice, it is part of the way your business does things, and if the homosexuals decline those terms you don't have to serve them. Period. It becomes a question of contracts, not religion, although religion is involved in the homosexuals decision to decline using the service.
Me, I'm looking for another way to fight this even in courts which are sympathetic to the homosexuals which makes the courts have to deny the most fundamental business arrangements or rule in favor of Christians who will not supply the service. This isn't wavering, it is just another way to fight.