It's too bad you do not understand what discrimination is. It is easy to look up. It does refer to protected classes, NOT to protected events.
The baker would have made exactly the same cake for the couple as he would for any other couple... a cake for a heterosexual wedding.
The lawyers for the baker do agree with me.
The person can purchase whatever item he wants for an event... a vendor does not have to create or sell a specific item.
I do not support legalizing discrimination.
An item or event is not subject to discrimination, only a person or protected class.
I cannot prove a negative... you must prove that discrimination applies to an event or anything other than a person or protected class.