Topics about religion are known to easily combust into flames, even in places where people get along, so whichever mod removed it thought it was too sensitive of a topic. May have been the timing, dunno, you'll have to ask the mod who removed it.
Due to the fact I have found no terms of service or user agreement, there are no real rules, nor do I believe moderators or admins even have the right to delete or edit posts and threads(I assume so as other forums reserve this right in the terms).