Well, our country was founded on the concept of separation of Church and State.....mainly due to the fact that our founding fathers had seen the problems that introducing a religion into government had caused such problems in the Old World.
Most of the problems we see today in the Middle East....and so many other parts of the world, find their causes in religious differences...
You are probably a Christian....so you find the concept of a Christian prayer in public schools non-offensive.....but I wonder how you would feel if, based on whatever majority happens to be in the school district, there would be American children coming home and saying that they were saying Islamic, or Jewish, or Buddhist, or some such prayers in their public schools...
After all, what is good for one group is good for all.....