Don’t fall into the leftist spin-trap.
The intent of the Establishment clause is to negate any government creating a State sanctioned religion to which everyone must agree (not attend, but agree).
It is not intended to be parsed into meaning a single, stand alone structure (an establishment).
It LEADS the 1st Amendment because \that\ is what the Founding Fathers father’s fled from Europe.
It LEADS the 1.A because a free people have a free conscience (hat tip to Martin Luther) in all aspects.
Life liberty and property
- hat tip to Edward Locke
Free to choose
-hat tip to Milton Friedman.