Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
The first part of the amendment, the Establishment Clause, is not a protection of individual rights, but of State prerogatives. The remainder of the amendment protects the mentioned individual rights.
Backtracking a bit.
From Article IV of the Constitution:
Section. 2. The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States
Then forward in time.
From Amendment 14:
Section. 1. All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.
The privileges and immunities clause of the original Constitution merely required that each State treat citizens of other States the same as their own citizens, with no Federal involvement.
That original clause was superseded and replaced by the privileges and immunities clause of the 14th Amendment. The broader wording of the new clause opened the door to the incorporation doctrine which the Supreme Court finally adopted.
I have no problem with the incorporation doctrine, insofar as the Supreme Court forced States to adhere to the protections of individual rights delineated in the Bill of Rights.
But they screwed the pooch when they incorporated the Establishment Clause. The Establishment Clause is NOT and NEVER was intended to protect any individual right. Therefore, the Establishment Clause should never have been incorporated.
The remainder of the First Amendment, yes. It was rightfully incorporated.
Now I realize there is a thread on the overall topic of incorporation which I don’t want to get into a duplication of, so I will limit my response to the First Amendment.