It is precisely why states continued to have state religions well after the Constitution was ratified. The colonies were basically established by certain denominations and established what the religion was to be in that particular colony. They did not give that up when they wrote the Constitution. They wrote the Constitution so that the FEDERAL government could never say one particular denomination was the official, national religion and therefore have preference over the others.
It is an example of states having abilities the federal government did not. As the federal government derives its power from the states, that means the federal government may do certain things now on behalf of the states, but can’t force it’s own limitations on powers the states never gave it in the first place.
What happened is over time more and more people moved around the states and emigrated here and not everyone was just living in states where their denomination was the state religion, and this gradually was done away with as the state religious denominations grew less homogenous.
Yup. I remember studying that YEARS ago. LOL