Should religion be taught in schools (optionally)?

I have no problem w/ religion while it doesn't confuse canon law w/ the law of the land. However, one should ask them self, has religion lost more souls than it saved? (across the centuries of hostility behind religion ie. the inquisition, jihads etc). Teach religion in parochial schools and respect those who don't want it taught in public schools. I'm for the separation of church and state.