Again, whether you believe he is practicing his religion wrong is irrelevant to the legal considerations.  As is the opinion of other people annoyed he will bake a cake for someone who has committed adultery and not for a wedding between 2 men. It's quite amazing how every time this hits the news, there is at least one person who proclaims that a real Christian would bake the cake, & another that he's being hypocritical to bake a cake for a hetero couple who have been involved in some other sin.  No one seems to notice the irony that they are basically deciding how he "should" practice his religion.  Which is the entire point of the legal battle.  Too many people somehow believe that public opinion should shape constitutional rights, & the more people indicate he's practicing his religion "wrong", the more people believe law should forbid his "wrongness". 

How HE decides to practice his religion is supposed to be protected by the 1st amendment. I'm glad you at least agree with that.