The 1st Amendment is currently one of the rights that is applied to the states due to the 14th Amendment.
Even without the 14th, a traveler to another state would be entitled to priviledges or immunities that he had in his home state.
Article. IV.
Section. 2.
The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States.
Amendment XIV
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.
I can not see that either article has any language that denies the right of states to put ( For instance the ten commandments ) on a wall in the capital building or any where else, it just gives the citizens the same rights in every state.
The wording separation of Church and state is not to keep the Church safe from the state but to finally weed out the people who believe in God out of Government.
It is for the express purpose of getting God out of government.
So the wording, separation of Church is just as phoney with or with out the 14th amendment.