Have you considered converting this territory into an "Abrahamic Religions" or "Monotheistic Religions" or even a plain "Religion" territory? That might attract more users and generate more discussions, because "Christianity" is limiting and restrictive to a degree while in fact many discussions relating to the Bible and Abrahamic faiths which are at least tangentially related, are on the surface ineligible or irrelevant for discussion.
You can thus expand your audience without sacrificing your main objective.