I think it had to do with the fact that the catholic pope could take your land and prists wore the only ones who could read the bible.
Health insurance is clearly a commercial activity occurring among several States. “power to lay and collect taxes, duties, imposts and excises, to pay the debts and provide for the common defence and general welfare of the United States.”
Integration of religion with Roman politics serving a pantheon that functioned more like family gods of the Roman state
