Holey moley batman. I'm not the one claiming my belief in some supernatural creature entitles me to discriminate against gay people in my business.
So how is this different from a Muslim restaurateur who refuses to serve me ham and eggs because of his religion?
Does the Muslim restaurant owner normally serve ham at his restaurant?
The two women who are suing saying that as Christians they shouldn't have to follow the law do calligraphy for weddings- they are saying they shouldn't have to follow the law and provide wedding calligraphy regardless of of the customers race, religion or sexual orientation.
The restaurant owner who doesn't put ham on the menu, doesn't put ham on the menu. But he is not saying he won't serve you.