Last I checked, they give you the cursory run of each major religion and it's history in school.
Yup that they did. But I suggest we learned much more about their relgous practices than you do today other than in those schools that stress these things. I used to love learning the Hanakah songs and the traditions behind them.

That's as far as it should go.
Again thats not what the founding fathers thought. Religion is still the best to way to teach morality. They wanted the fear of god to be in everyone.