Private schools can have religious songs (right of assembly, free speech, free exercise of religion), government should stay out of religion (Congress shall make no law respecting an establishment of religion), and teachers and coaches can lead prayers in private schools (right of assembly, free speech, free exercise of religion).
Feel free to do all that. I'm not censoring you. But if you try to impose your religious views on my kids in public school, I'll see you in court and I'll win. I'm sorry that you don't seem to understand.
Your argument for religious songs and prayers in public schools indicates that you are in favor of state sponsored religion (the question I asked but you didn't answer directly). Sorry, but we have little in common. Your view is directly opposite that expressed in the First Amendment. My sympathies to you.
You have no knowledge (even with the links provided on this thread) of the history or intent of the First Amendment. You are in favor of Judicial tyranny, on the side of Ruth Bader Ginsberg, former Klu Klux Klan member Hugo Black, Ted Kennedy, the CPUSA, the ACLU and others who have sought to tear down our Consitutional Republic.
Becaue you don't want something, you are willing to allow judges to force people to do what you want. You do not want it to come to a vote, for the law to be changed in a democratic manner, because you are afraid you would lose.
Be aware, someday your love of rule by judicial fiat will come back to bite you.