The designation "Jerusalem, Israel" has a geographic term "Jerusalem," and a political term "Israel." This form is widely used and appropriate historically for Jerusalem from 1948 to the present.
But if we want to strictly follow this geo plus political pattern in our genealogical database records, is the following accurate for other periods of Jerusalem's history?
Jerusalem, Mamluk Sultanate (for 1260-1516)
Jerusalem, Ottoman Empire (for 1516-1916)
Jerusalem, British Mandatory Palestine (for 1916-1948)
Jerusalem, Israel (for 1948-present)
I note that when entering a place name in a person's record in a Family Tree on the familysearch.org, the only valid form for "Jerusalem" is "Jerusalem, Jerusalem, Israel," which doesn't seem to be widely used outside of their database.
If there is no standard to this, then perhaps it would be acceptable to use just "Jerusalem" for all periods before 1948-.--
[Please don't let this discussion devolve into any unpleasant political issues. That is not my intention and I won't participate in it.]
Peter J. MacDonald
Kishinev, Bessarabia: FRAYNT, FRANT