[mplawssix]

You seem to be shy to follow the argument all the way - "since US is highly religious (Christian) country, Christianity should be taught at schools". That of course would violate separation of church and state principle.

Of course, but Christianity isn't the sole religion, and may represent the majority, but does not represent everyone. So atheists (one example) would be in a poor position, being forced to send their children to a Christian Public School. Which is why I think a middle ground would be most beneficial.