Public schools did fine before there was atheistic exclusion of Christianity from them. Public schools have far more money now than before, and yet have far lower quality now.

["Andy that's not a valid argument; it's a correlation-causation fallacy. Again, if Christianity is the root of success in public schools - why is Japan at the top of the list, where a hugely significant majority of the population defines themselves as non-religious?"]

Correlation is often due to causation, and the exclusion of Christianity was clearly a cause of the subsequent decline in values, motivation, safety, and achievement of public schools. It is equally clear that many atheists are the driving force in expelling all things Christian from public schools to this day.