I tried like heck to find the words "separation of church and state" in the Constitution, but I couldn't. I did find a lot of stuff about the First Amendment and freedom of expression, etc.

I agree that "Christmas Concerts" can be exclusionary and in some cases offensive, but there has been government guidelines based on the First Amendment that offer ways and situations where religion can enter the public schools.

Some interesting facts that I came across. The U.S. Constitution is the oldest such governmental document still in effect today. And as if you didn't suspect, the U.S. is the most religiously diverse country in the world.

Here is a quote from Pres. Clinton regarding religious belief in public schools.

[QUOTE] Nothing in the First Amendment converts our public schools into religion-free zones, or requires all religious expression to be left behind at the schoolhouse door. While the government may not use schools to coerce the consciences of our students, or to convey official endorsement of religion, the public schools also may not discriminate against private religious expression during the school day.

Religion is too important in our history and our heritage for us to keep it out of our schools. It shouldn’t be demanded, but as long as it is not sponsored by school officials and doesn’t interfere with other children’s rights, it mustn’t be denied.
[QUOTE]

Also, if your interested in broadening your perspective on this issue....www.firstamendmentcenter.org

Oh, yeah......Merry Christmas