No amount of repetition of historical errors in judicial opinions can make the errors true. The "wall of separation between church and State" is a metaphor based on bad history, a metaphor which has proved useless as a guide to judging. It should be frankly and explicitly abandoned.
Wallace v. Jaffree, 472 U.S. 38 (1985) (dissenting opinion). - Judicial opinions
472 U.S. 38[law.cornell.edu]