The FEDERAL GOVERNMENT was the middle ground BETWEEN the states. It didn't mandate a religion because the states were doing it themselves! They didn't want the debate about which church should be the state church to enter into the debate on federal issues. They wanted each state to chart its own course.
The idea of pluralism came a lot later after the Constitution was ratified. Or rather, was ADOPTED a lot later. The constitution never forbade state religions nor mandated it.
The idea of pluralism came a lot later after the Constitution was ratified. Or rather, was ADOPTED a lot later. The constitution never forbade state religions nor mandated it.