Except that separation of church and state, as liberals so often tout and as defined in the Constitution, does not prohibit prayer in the classroom, nor nativity scenes in the town square. They forget entirely that our nation was founded on religious principles by religious people, that most people in the world worship some higher power, and that they are not empowered to deny religious practices in schools at the federal level.
States and local municipalities can do as they wish as long as such actions are not prohibited expressly under the founding documents.