Itse's bill would change the law to allow all "religious officiants authorized by their church, religion, sect or denomination to solemnize marriages in the way usually practiced among them" - with a catch. Those ceremonies would only be allowed "provided that such marriages do not conflict with existing state law prohibiting marriage between persons of the same sex."
What is this but trying to say that the only way to have faith is to believe as we do. Let individual churches, congregations, denominations make up their mind as to what their faith calls them to do. Don't impose burdens that you yourselves are unwilling to bear. (I believe that last statement is one that Jesus said to the Pharisees.)