However, making sure that government does not take over the church, and the church does not take over the government, is healthy, reasonable, and Biblical.
What I meant by my previous statement is that the church, through the guidance of the word of God, is responsible for teaching right from wrong. Morals and ethics come from God, and it is the churches job to preach them (among other things.) By "church" I mean any and all people who have been forgiven of their sins and bow to Christ as Lord.
The church is certainly a good source for teaching right from wrong but I don't believe it is the only possible source. A child can certainly be taught that harming another person is wrong without faith being a source for the lesson.
As far as Christianity being the correct religion, I can't say that I agree with you. Although I was baptized as a Christian, in my fifty-one years I have seen too many atrocities perpetrated by so called Christians, all in the name of morality.
Actually, IMO that is why Christianity is losing favor in this nation. Anyone who claims to be strongly religious and moral and then performs acts that show themselves to be hypocrites damages the perception of Christianity as a whole. I guess I have just seen too much hypocrisy to continue to believe.