Inspired by this question, but I am attempting to ask a more largely applicable point.
Questions which are about Jewish History are considered off topic. Now the Jewish History examples given there are very recent history, but unless I'm missing something, something that asked for the migration patterns of Jews after the destruction of the Second Temple would seem equally off topic, and I have definitely seen earlier history answers closed.
In this case, the asker (and I'll admit it isn't clear in this specific case as the question has undergone a lot of revision which presumably maintains a singular intent throughout but to a third party observer can seem very different) is specifically stating:
This question is looking for evidence demonstrating that the halacha was either the same or was different in that era.
And yet also states:
This is because explanations which are based on later halacha may not accurately reflect the circumstances present in the Tanach, and may instead be back-reading or inserting anachronistic concepts.
And thus (at least I think that is his reason) rejects the Rambam as evidence to the proposition. Is a question that a priori rejects such a Jewish source as evidence for the Jewish position on whether or not a Halacha applied then really asking a question about Judaism and not just exclusively about history?
Now I realize that applying this to this particular question may not be an exact match, but I am asking in general where the line between a purely historical question about Jews stops and a question about Judaism starts?
