Richie: Again, you did it. You used "establish" as a verb and not the noun that it was originally written. That's the single-most common error I've ever seen when it comes to reading the Constitution (the second being what the meaning of "well-regulated militia" is).

Read the writings of Jefferson and Madison.

And NO Congress does NOT have to hide religion from the public square - that's been established time and time again. What HAS been prohibited is preferring one over the other. You can't allow a nativity scene and prohibit a menorah.

What DOES happen is that local districts in their brainless and spineless wisdom decide they don't want to dip their toe into the controversy and prohibit EVERYTHING.