Church and state are not separated. State is forbidden from establishing a national church. The people are free to choose and practice their religion including voting and demanding that their politicians uphold and respect their religious views. Religion is protected. Government is not.
Many times the age of the bible is brought up. Why is that relevant? People 1000 or 2000 years ago are people just as we are today.
Yes religion is protected. But, I believe religion needs to stay out of government. You can't govern a whole nation with multiple religious beliefs using the bible. Laws shouldn't be made because the bible said it's wrong.
It was written in an entirely different time period. Humanity has changed. We have moved forward. Can't govern todays modern society by a book that was written in a different time period. Especially since it's written due a religious faith in god, not written in facts. To you who is religious christian, it may be fact to you. But, to others who are atheists, muslim, agnostic, etc it's just material written in faith in that one religion.