Two scenarios:
1. A gay couple chooses a Christian provider for their wedding, then sues him when he refuses.
2. A gay couple chooses a Christian restaurant to buy a sandwich, then sues the restaurateur when he refuses.
I think, for a number of valid historical reasons, people in general support the Christian business owner in (1), but would support the gay couple in (2). The left-wing strategy was to conflate (1) and (2).
Was there anything that distinguished catering to a public display of homosexual activity, which the gay “wedding” is, and catering to a universal human need, such as eating sandwiches? I read the bill briefly and it does not seem to make the distinction.
If I call a pizza place and tell them that I want two dozen pizzas delivered somewhere tomorrow night they will assume that it's some sort of gathering, but they won't ask what it is (it could be anything from a children's birthday party to a work function to a church gathering to a wedding). All the pizza place will do is ask for my credit card number and general info. And the reason for this is because they know that them providing pizza doesn't indicate their opinion one way or another on what the occasion is (nobody cares if there are a bunch of Papa John's boxes in a meth lab, it's just pizza).
However, weddings are different. A decorated wedding cake from a specific bakery carries an implicit endorsement and the same goes for a catering company with their name on vans outside. The ACLU and others might make a fuss, but would anyone really be surprised if a bakery refused to make a cake promoting pedophilia? Would a caterer be expected to cater an orgy? This is no different.
Seventeen years ago when my wife and I were getting things arranged for our wedding there was a particular bakery that we wanted to have the cake from. We made an appointment, went and tasted cakes, picked out a design and had it all figured out UNTIL we informed them that the wedding was over a hundred miles away and then the bakery refused to do it. We went back and forth for several days, we offered to pay for renting a refrigerated truck, we said we'd pay extra for their workers, we would have a fully-equipped commercial kitchen for them to use, etc. Basically, we told them that we would give them anything they wanted to make the cake; however, they were unwilling to take the risk of ruining the cake, they wouldn't even let us have someone else pick up the cake from them and bring it BECAUSE IT WOULD AFFECT THEIR REPUTATION. So, we respected their decision and got our wedding cake elsewhere and we continued to buy cakes and pastries from them until we moved away two years ago, we certainly never contemplated suing them.