I have been here since 1998 even before i signed up, and have never had anyone tell me i had to be a white puritan christian to be a poster/commenter on this site.
Now i would make a common sense guess if you started posting insults about the site owner you’d probably get membership yanked.
There are plenty of self professed and obvious by their posts, seflf described athiests and agnostics that get into discusiona and arguments here. At least i now that has happened prett much ever since I’ve been here.
As far as i know they are still here, havent seen any statement from anyone in charge saying they will no longer be allowed here.
What i do see across 23+ years here is unpredictable behavior from admins in terms of what is acceptable or not, many people often do not know what is done wrong as you are not always told, and sometimes you cannot communicate with them to discuss/explain things or even ask for clarification if they suspend you. That is very frustrating.
But no one here has to take an oath or swear a creed or be white, christian etc to have an account. That said if you sign up to be a troll or othwrwise just cause problems here, you will eventually be identified for what you are and most likely shut down.
Good post.