Just to elaborate on plannapus' argument:
What we want to avoid are situations like the following:
- Someone gets banned from Christianity.SE; decides to post their questions here instead (because we talk about religion).
- Stack Exchange decides that they won't create a website for a certain religion; people take their [religion x] questions and ask them here.
In my meta post responding to fredsbend's proposed rule, I told him not to to create specific criteria to identify questions like yours (i.e. "all questions discuss a specific text"). There are a few other examples of people posting here instead of on their dedicated religion site, but not to the point where we could create a specific criteria for identifying these questions/answers. We don't have enough data to know what form these questions are going to take.
However, I think we can all agree that your question fits the definition of "asking a religion question that should be asked on the [religion x] Stack Exchange and not on Mythology." As such, your question should remain closed.
I'm sorry that we don't have a clearer reason, but that the downside of participating in a beta site. In a year we'll be able to explain exactly why that post was closed.