They admit that there is a fulfillment that refers in symbolic terms to the return of the Exiles from Babylon—and that interpretation I agree with.
Of course, they then proceed to have a second and third fulfillments. For instance, symbolic/spiritual interpretation referring to the “spiritual paradise” since 1919. And then a future, literal fulfillment to come.
Now they are backing off types/antitypes, I don’t know how they would stretch the fulfillment of this to either 1919 or the future. But that’s never stopped them before.