Provide rules that require religious tolerance, while still allowing respectful criticisms of said religions.
Basically just avoiding the edge lord/ hate speech stuff.
Over at /r/nihilism we always had a similar issue.
Any posts that are critical of religion should be fact based and impartial as possible. Sources should be required.
As an example:
Posting a rant about how how you don't like Islam: [deleted]
Posting a link to a news article about the statistical rate of s**ual harassment in the catholic church: "A+"
(Just examples)
All that being said, I think we should more focus on how to live our lives positively and effectively. A lot of people perseve atheists as having no motivations/ being unreliable. I think we should try to overcome that image by focusing on progressing our own "beliefs", and spreading our message: "Life is what you make it."
We should also strive to be a safe place for recent refugees of different religious backgrounds. Not only should we be a place of open discussion and critical thinking, but a place of support and recovery. That's more my opinion, though.
I would love to see posts like:
"Tips on staying positive after recently losing your faith"
"Rebuilding a social network after cutting ties with toxic family"
"How to come out to your religious family as atheist"
"I recently came out as atheist and my family disowned me, what should I do?"
"What are some good movies you'd suggest for an atheist?"
"Here is some art I made as a social commentary on religion"
"Making eye contact during prayer"
Etc...