Free speech does not suffer from the freedom of religion and assembly.
From your statement that, I will not recognize secular philosophies as qualified subjects for devotional thread protection, it sounded as if strict freedom of assembly protection would only apply to theistic based devotionals.
Rather an ask for blank check, would you be willing to review an Objectivist devotional post and give it the same protection from challenges if it met some reasonable criteria, other than claiming to be divinely inspired.