Correct, the constitution does not use the terms “separation of church and state”.
Clarification: “Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof:” This pertains to a “national” religion.
Massachusetts had a state religion, and it was constitutional to do so.
Even though, Congress was forbidden, the continuous lawsuits, have allowed activist judges to remove religion and push us toward a secular society, which I am getting tired of after more than 60 years of this crap.
Why can't the secularists and atheists quit their proselytizing and pushing their agnostic sects on the majority of the people in the US?