There is a reason threads exist and have a title. They have a topic of discussion, and every exchange has to take part within those parameters. Suppose that more christians and atheists alike see your posts, this thread about the Political Compass is going to turn into a flame war about religion. That reason is why making a separate thread about religion is the best choice. It wouldn't be fair if someone made a thread about favourite videogames and people started fighting over eugenics in that thread.