What is the scope of the religious Stack Exchange sites?
Are those sites, like any other page, open to everyone, and you can ask any type of questions about the religion, as long as they respect the Stack Exchange policy and are on topic? Or the question must assume, that, at least to some extent, the particular religion is true?
The example would be to ask about the originality of the scriptures, for example how we can trace the Evangelies to their alleged authors? This particular question would be on topic on History, but it's just an example.
Or is any site free to define their own rules?
What inspired me for the question were particularly the religious salutations on Islam, which give an impression, that people neither being Muslim or being interested in becoming one, but simply wanting to learn more about Islam, aren't welcome to ask.