"If athiesm is a religion, does the banning of Christian and Jewish symbols (such as Nativity displays, the Menorah, and the Ten Commandments) from public places constitute an unconstitutional endorsement by the State of athiesm as a religion."In a heartbeat ACLU and allied groups will claim Agnosticism rather than Atheism as their guiding principle in these matters. Agnosticism can never be defined as a religion because, unlike Atheism, it has no beliefs.
believing in nothing ... is still believing in something.