Yep. It gets a little boring having to rehearse these arguments over and over again. The "establishment" clause in the U.S. Constitution had to do with official state churches (one Christian denomination, Anglican or Congregationalist primarily) and the doctrines which distinguished them from each other. The existence of God and a moral order were not disputed. Nor were civic prayer, prayer in schools, or Bible instruction in schools.
The elaborate "Separation of Church & State" mythology which has evolved from aggressive secular humanist extremists suggesting such ridiculous things as forbidding public displays of Christmas symbols, etc., is a modern fantasy created by liberals with pathological fears of, apparently, even religious imagery.