Atheist is not a political doctrine. Atheists tend to believe in the constitution of the United States and the “Doctrine” not clearly stated in that document but attested to by one superior court after another; “Separation of Church and State.” Separation of Church and state is your ‘doctrine’ and it is believed to be useful by most atheists, I imagine,’ but also by a huge number of theists.
Religions that believe in separation of church and state.
Separation of Church and State - Jewish Action Center
The separation so church and state ensures the freedom of religion as well as the freedom not to believe in religion. IT IS NOT AN ATHEISTI IDOLOGY OR AN ATHEIST POLITICAL AGENDA.