Why would you think that? What do you think "incorporated means?
This ruling applies to marriages performed outside of churches, and does not apply to marriages performed inside of churches. SCOTUS is ordering the state government apparati (which emphatically aren't churches, this is government officies, about as heathen as heathen gets) to issue marriage licenses to homosexual couples, and to perform civil marriage ceremonies for homosexual couples, and to recognize this civil union when performed in any other state.
None of that says that a church must perform a marriage ceremony for a homosexual couple, although I am sure many churches are jumping at the chance to do so.