The "Incorporation Doctrine" used to expand the 14A, is not constitutional and invalidly overturned the
Slaughterhouse precedent. It is one of the many judicially active things that SCOTUS has done to amend the Constitution from the bench and give the feds massive, basically unlimited, unconstitutional power.
(It's possible you and I talked about this sometime ago, not sure.)
The "Incorporation Doctrine" used to expand the 14A, is not constitutional and invalidly overturned the Slaughterhouse precedent. Nevertheless, it is the precedent that applies in cases like these. We can try to get it overturned, but until it is overturned by another case, the Bill of Rights applies to state and local governments as well.